Chisel Guide Australia: Cold, SDS Plus, SDS Max & Masonry Chisels — Sutton Tools, Stahlwille & Trax

What Is a Chisel? Cold, SDS and Masonry Chisels Explained

A chisel is a hand or power-driven cutting tool with a hardened edge, used to cut, shear, or chip away material by driving that edge into the workpiece — with a hammer, a rotary hammer drill, or an air hammer, depending on the type. This guide covers the industrial and trade chisel range AIMS Industrial stocks: cold chisels for cutting steel and iron, SDS-Plus and SDS-Max masonry chisels for concrete, brick and stone demolition, and air chisel bits for pneumatic hammers. It's about the cutting tool, not the Australian rock band of the same name.

The "cold" in cold chisel refers to how the tool cuts, not the temperature of the workshop. A cold chisel cuts metal at room temperature, without heating the workpiece first — as distinct from a blacksmith's hot chisel, which is used on steel that's been heated in a forge to make it easier to cut. Nearly all general trade and maintenance chisel work in a modern workshop is done cold, which is why "cold chisel" and "chisel" are used almost interchangeably in that context.

One disambiguation worth making early: AIMS does not stock wood or woodworking chisels — bevel-edge, mortise, or carving chisels. If you're after a woodworking chisel, our range won't have what you need — contact our trade team and we'll point you in the right direction. Everything below is about cutting and chipping steel, masonry, and concrete, not timber.

Chisel Types Compared

AIMS stocks ten distinct chisel and related-tool types across the chisels collection, each suited to a different job and driven a different way:

The flat cold chisel is the most commonly used form in a general workshop — it handles the widest range of cutting, shearing and chipping jobs on steel and iron, and it's the one most workshops reach for by default. Cross-cut (cape) chisels are narrower and ground to a point along the cutting edge, purpose-built for cutting a groove or keyway rather than a wide face — trying to cut a narrow keyway with a wide flat chisel usually damages material either side of the intended line. Diamond-point chisels take that a step further with a diamond-shaped cross-section, useful for cleaning out square internal corners that a flat or cross-cut chisel can't reach cleanly, such as squaring off the bottom of a slot after the bulk of the material has been removed.

Bolster and plugging chisels look similar at a glance but do different jobs and aren't interchangeable in practice: a bolster chisel is wider and bevelled on both faces for cutting and splitting whole bricks, while a plugging chisel is narrower and shaped to rake mortar out of a joint without damaging the bricks either side. Reaching for a bolster to repoint a wall — or a plugging chisel to split a brick — makes both jobs harder than they need to be and increases the risk of damaging material that was meant to stay intact.

Air chisel bits extend the same family of cutting profiles into pneumatic tooling — Trax's range covers scraper, bushing splitter, flat, panel cutter, spike and rivet buster profiles, in both round-shank and hex-shank fitments, matched to whatever air hammer the workshop already runs.

Chisel Sets vs Buying Individually

A multi-piece chisel set is generally the better starting point for a workshop that doesn't already know exactly which sizes it needs — Sutton Tools' M7100 soft-grip 5-piece cold chisel set covers 10, 12, 16, 19 and 25mm in one purchase, spanning narrow precision work through to broad general chipping without needing to guess at a single size and find it's wrong for half the jobs that come up.

Buying individual chisels makes more sense once a workshop has a settled sense of which sizes actually get used — replacing a single worn or mushroomed chisel from a known-good size, or adding a size the existing set doesn't cover, without duplicating sizes already on hand. Individual Stahlwille chisels, such as the grooving flat chisel (240 x 26mm, CrV steel), suit this more targeted purchasing pattern — a specific tool for a specific, recurring job rather than general coverage.

For masonry and SDS work, sets are less common than in cold chisel ranges — SDS-Plus and SDS-Max chisels tend to be bought individually or in small combinations matched to the specific demolition or chipping job at hand, since the profiles (angled, pointed, chasing, flat, toothed) serve quite different purposes rather than forming a natural graduated set the way cold chisel widths do.

Cold Chisel vs SDS Chisel: Which One Do You Need?

This is the most common point of confusion in the range, and it comes down to one question: is the tool being driven by a hand hammer, or by a rotary hammer drill? A cold chisel is a hand tool — you strike the head yourself, and the chisel does no work between strikes. An SDS chisel (Plus or Max) is not a hand tool at all; it has no head to strike, and it's driven entirely by the internal hammering mechanism of an SDS rotary hammer. The two aren't interchangeable, and using one where the other is designed to go either doesn't work or damages the tool.

As a rule of thumb: reach for a cold chisel for hand-driven metalwork — cutting bolts, shearing sheet steel, removing rivets, breaking a weld — where a rotary hammer isn't the right tool for the material anyway. Reach for an SDS-Plus or SDS-Max chisel for concrete, brick, render or stone demolition, where the rotary hammer's repeated internal impact does the cutting far faster and with less fatigue than swinging a hand hammer all day. If the job is metal, it's a cold chisel job. If the job is masonry or concrete and you already own — or can hire — a rotary hammer, it's an SDS job.

A quick way to check before buying: if the job needs a hammer swung by hand, a cold chisel is correct and an SDS chisel physically can't be used the same way. If the job is chipping into a hard mineral surface — brick, block, concrete, stone — and a rotary hammer is already on site or worth hiring for the volume of work involved, SDS is the faster, less fatiguing choice.

SDS-Plus vs SDS-Max: Chisel Fitment Explained

SDS-Plus and SDS-Max are two separate shank systems, and they are not interchangeable — an SDS-Plus chisel will not fit an SDS-Max rotary hammer, and an SDS-Max chisel will not fit an SDS-Plus rotary hammer. The systems differ in shank diameter and the groove pattern that locks the tool into the chuck, so there's no adaptor that safely bridges the two.

SDS-Plus is the standard fitment for everyday rotary hammers used on concrete chipping, render removal and general masonry work — it covers the bulk of trade and maintenance demolition tasks and is what most rotary hammers on a typical van or in a typical maintenance workshop are built around. SDS-Max is reserved for larger, heavier rotary hammers used on serious demolition work — thick reinforced concrete, larger-scale chipping, and jobs where a bigger hammer mechanism is doing meaningfully more work per strike than a standard rotary hammer can manage. Before buying an SDS chisel, check which system your rotary hammer takes — it's stamped on the tool or listed in its specifications — because the two ranges look broadly similar at a glance but won't fit each other's machines.

AIMS stocks both systems: SDS-Plus and SDS-Max masonry chisels from Sutton Tools and Bordo, in angled, pointed (helical), chasing, flat and toothed profiles, across both fitments — and P&N masonry chisel and SDS drill combination sets for workshops wanting drilling and chipping covered together.

Choosing Chisel Width

Chisel width should match the groove or cutting line the job actually calls for, not be chosen by whatever's closest to hand. Wider chisels — typically in the 20-25mm range for cold chisels — suit broad surface work: general chipping, cutting through wider material, and clearing larger areas in one pass. Narrower chisels — around 10-12mm — suit tight joints, precision cuts, and situations where a wide edge would damage material either side of the cut line, such as cutting a groove close to an edge or feature. Cross-cut and cape chisels run narrower again, since their job is a groove or keyway rather than a broad face.

A chisel set that spans this range removes the guesswork — Sutton Tools' M7100 soft-grip cold chisel set covers 10, 12, 16, 19 and 25mm in one set, which is a practical spread for a workshop that doesn't want to buy individual chisels one job at a time and discover mid-job that the size on hand isn't right for the cut.

Steel Grade and Construction

Chrome vanadium (CRV) steel is the standard construction for quality cold chisels, and it's what gives a chisel the combination of hardness and shock resistance it needs to survive repeated hammer strikes without chipping or shattering at the head. A chisel that's too hard at the striking end will crack or shatter under impact; one that's too soft will mushroom quickly and need dressing far more often. CRV construction is designed to sit in the right place on that trade-off for repeated impact work — it's the material Sutton Tools' cold chisel range is built from.

Heat treatment plays as large a role as the base alloy — a chisel's cutting edge is generally hardened and tempered to hold a keen edge under cutting load, while the striking head is left slightly softer so it absorbs hammer impact by deforming a little rather than cracking. This is also why dressing a mushroomed head on a bench grinder needs care: grinding too aggressively and overheating the head risks drawing the temper out of that end of the tool, changing how it behaves under the next strike.

Stahlwille's grooving flat chisel (240 x 26mm) is also CrV steel construction, aimed specifically at precise material removal in metalworking and engineering applications rather than general-purpose chipping — a heavier, more purpose-built tool than a general cold chisel set, suited to a workshop doing repeated, similar grooving work rather than varied one-off jobs.

How to Use a Cold Chisel Safely

Match the hammer to the chisel, not the other way around. A cold chisel struck with too light a hammer doesn't cut cleanly — it bounces, skids, and tires out the user well before it does the job, which is itself a safety problem as much as an efficiency one. The right hammer weight for the chisel and material lets the chisel do the cutting in controlled, deliberate strikes rather than needing repeated, increasingly frantic hits. For a full rundown on matching hammer type and weight to the job, see the AIMS Hammer Types Guide.

Hold the chisel with a firm, relaxed grip — gripping too tightly transmits more shock back through the hand on every strike without improving control. Keep your eyes on the cutting edge, not the head being struck; a chisel that shifts mid-strike is far more likely to cause an injury if attention is on the hammer rather than where the edge is tracking. Strike squarely and let the chisel's bevel do the cutting — driving the chisel in at the wrong angle blunts the edge faster and increases the chance of the tool skating off the work rather than biting into it.

Clear the immediate area of anyone standing in the likely path of flying chips or fragments before starting, particularly on jobs where a chisel has been in service a while and hasn't been checked recently. A chip travelling off a cold chisel at speed doesn't announce itself in advance, and the safest way to manage that risk is keeping bystanders well clear rather than relying on them reacting in time.

Never use a chisel for a job it wasn't designed for — as a screwdriver, a pry bar, or a punch. The steel and edge geometry that make a chisel good at cutting make it a poor and often dangerous substitute for a tool actually designed for prying or driving, and using it that way is one of the more common ways a chisel edge chips or a head fails unexpectedly mid-job.

Struck-Tool Safety: Mushroomed Heads and PPE

Inspect the chisel head and cutting tip before every use, not just when something feels obviously wrong. A mushroomed head — where the striking end has spread outward from repeated hammer impact — is a genuine shrapnel risk: fragments can shear off the mushroomed edge and travel with real force. A mushroomed chisel should be dressed back with a grinder and re-bevelled before it's used again, not kept in service until it visibly fails. For grinding technique and wheel selection, see the AIMS Bench Grinder Guide.

Tip damage causes its own problems even without a mushroomed head — a chipped or rounded cutting edge cuts poorly and is more likely to skate or ricochet off the workpiece under a hammer strike. Safety glasses meeting AS/NZS 1337.1 are mandatory whenever a chisel is being struck, along with leather gloves — chip fragments and any shrapnel risk from a damaged head are real, not theoretical, and both hands and eyes are in the strike zone. See the AIMS Safety Glasses Guide for lens and standard selection.

Leather gloves are the standard choice for chisel work over lighter general-purpose gloves — they need to stand up to repeated abrasion against the chisel body and offer real protection against a glancing chip, rather than simply improving grip. A glove that's too bulky, though, can cost enough dexterity and feedback through the hand that it becomes its own hazard by reducing control over exactly where the chisel edge is tracking — fit matters as much as material.

SDS chisels carry a different, specific warning: never strike an SDS chisel with a hand hammer. It isn't designed to take a manual strike at all — the tool is driven by the rotary hammer's internal mechanism, and manual striking risks damaging the tool or the operator. Eye and hand protection still apply to SDS and air chisel work — flying masonry and concrete fragments are just as real a hazard as metal chips, arguably more so given the harder, more brittle nature of the material being chipped away.

Common Chisel Mistakes to Avoid

Using a mushroomed chisel "because it still cuts fine" is the single most common mistake in workshops that see regular chisel use — the shrapnel risk from a mushroomed head has nothing to do with whether the chisel still cuts, and the two should never be conflated when deciding whether a chisel needs dressing.

Choosing a chisel by whatever's within reach rather than by width and type is the second most common — reaching for a wide flat chisel to cut a narrow keyway, or a bolster where a plugging chisel was needed, generally makes the job slower and increases the risk of damaging material that was meant to stay intact.

Undersized hammers are a recurring issue too: a hammer that's too light for the chisel and material leads to more strikes, more fatigue, and a less controlled result than a correctly matched hammer delivering fewer, cleaner strikes. And attempting to strike an SDS chisel manually — treating it like a cold chisel because it's shaped similarly — is a mistake specific to workshops that stock both systems side by side and haven't clearly separated them in storage.

Sharpening and Maintaining a Chisel

A cold chisel's cutting edge dulls with use, the same as any other edged tool, and a dull chisel is both less effective and less safe — it needs more force to do the same cut, which increases the chance of a slip. Sharpening restores the bevel angle on a bench grinder, keeping the edge square and even rather than rounded off to one side. Dress any mushrooming on the head at the same time as sharpening the cutting edge — both wear in normal use, and doing both in one pass keeps the tool fully serviceable rather than fixing one problem and leaving the other. See the AIMS Bench Grinder Guide for wheel grit and technique.

Keep the chisel moving across the grinding wheel rather than holding it in one spot, and quench periodically in water if removing significant material — overheating the cutting edge risks drawing the temper out of the steel, leaving a softer edge that dulls faster than before it was sharpened.

Between uses, keep chisels stored so the cutting edges aren't knocking against other tools — a rolled tool pouch or dedicated slot protects the edge far better than tossing chisels loose into a drawer, which blunts the tip through everyday handling as much as through use on the job. Keeping cold chisels and SDS chisels stored separately also reduces the chance of grabbing the wrong type for the job at hand.

Air and Pneumatic Chisels vs Manual Cold Chisels

An air chisel — driven by a pneumatic air hammer rather than a hand hammer — trades manual control for speed on repetitive chipping, cutting and busting work. AIMS stocks a wide Trax air chisel bit range, including round-shank and hex-shank fitments in scraper, bushing splitter, flat, panel cutter, spike and rivet buster profiles, plus Trax air chisel hammers and multi-piece kits.

Air chisels suit high-volume or repetitive jobs — panel cutting, rivet busting, general demolition chipping — where the speed of a pneumatic hammer's rapid strike rate outweighs the control a hand-driven cold chisel gives you strike by strike. For finer, more controlled single cuts — cutting a specific bolt, shearing a precise line, cleaning up a weld — a manual cold chisel remains the better tool, since the operator retains full control over exactly where and how hard each strike lands.

Running an air chisel means running it off compressed air, so it's worth checking the tool's air consumption against your compressor's output before assuming an air chisel will slot straight into an existing shop air line without affecting other tools drawing from the same compressor. For the full pneumatic tool range and compressor matching, see the AIMS Air Tools & Pneumatic Tool Guide.

Chisels in a Wider Trade Toolkit

Chisel work rarely happens in isolation from the rest of a workshop's hand tools. Holding the workpiece securely — rather than by hand — matters more with a chisel than with most hand tools, since a slipping workpiece under a hammer strike is a direct injury risk; a solid bench vice makes controlled chisel work meaningfully safer. See the AIMS Bench Vice Guide for selecting one sized to your bench and typical work.

Marking out the cut line before chiselling — rather than working freehand from a rough estimate — is standard practice for anything beyond the crudest chipping job, and ties directly into the AIMS Centre Punch & Scriber Guide for scribing an accurate line and punching a start point. After chiselling, a hand file is generally what cleans up the cut edge — see the AIMS Hand File Guide for profile and grade selection to match the finish the job needs.

For related struck and marking-out tools stocked alongside the chisel range, see the AIMS hammers collection and the punches range.

Brands AIMS Stocks

AIMS Industrial stocks chisels from established trade and industrial brands, each covering a different part of the range:

• Sutton Tools — cold chisels (individual and the M7100 soft-grip 5-piece set, 10-25mm, CRV steel) and SDS-Plus/SDS-Max masonry chisels across angled, pointed, chasing, flat and toothed profiles. The broadest single-brand spread in the range, covering both hand-driven and rotary-hammer-driven chisel work.
• Stahlwille — grooving flat chisels (240 x 26mm, CrV steel) for precision metalworking and engineering work, plus chisel and punch wallet sets and finger-protector accessories for hand-held chisel and punch work.
• Trax — air chisel bits (round-shank and hex-shank, multiple profiles) and air chisel hammers, including multi-piece kits, for pneumatic chipping and demolition work.
• P&N — masonry chisels and SDS chisel/drill combination sets for combined drilling and chipping jobs.
• Bordo — SDS-Plus and SDS-Max masonry chisels for concrete, brick and stone work, across both fitments.
• Maxigear — chisel-tip scribers and related marking-out tools for scribing a cut line before chiselling.

Browse the full range in the AIMS chisels collection, or the broader files & chisels range for hand files alongside the chisel selection. AIMS Industrial has been supplying the Australian trade since 1988, stocking locally and working with trusted local brands and distributors for fast, reliable supply.

Need help matching a chisel to your job, or checking SDS-Plus versus SDS-Max fitment before you order? Call AIMS Industrial on (02) 9773 0122 or contact our trade team — or request a quote for a bulk workshop order.

Typical Trade Applications

Cold chisels see regular use across general engineering and maintenance work — cutting through corroded or seized bolts that won't come out any other way, shearing sheet steel to rough size before finishing, removing rivet heads during panel or structural repair, and breaking old welds apart during rework or demolition of a fabricated assembly. Automotive and light-vehicle workshops keep a set on hand for exactly this kind of stuck-fastener and panel work, alongside the wrenches and sockets used for routine disassembly.

SDS-Plus and SDS-Max masonry chisels turn up most often on renovation and construction sites — chasing a channel for conduit or pipework into a masonry wall, removing render before repair, breaking out a section of concrete slab for a new penetration, or general demolition chipping ahead of a rebuild. Bolster and plugging chisels are trade staples on any job involving bricklaying or repointing, where a rotary hammer is often more than the job needs and a hand tool remains the more practical choice for a small, precise section of work.

Air chisel bits earn their place in panel shops, fabrication workshops and any environment running compressed air already for other pneumatic tools — the speed advantage on repetitive rivet-busting or panel-cutting work is the main reason to reach for an air chisel over a hand-driven one once the volume of similar cuts justifies setting up the air line for it.

Chisel Safety Checklist

A quick pre-use rundown worth running through before any chisel comes out of the tool roll, whether it's a cold chisel, an SDS chisel, or an air chisel bit:

• Inspect the head and tip for mushrooming or damage before every use — dress on a bench grinder if either is present, don't wait for a failure.
• Wear safety glasses meeting AS/NZS 1337.1 and leather gloves whenever a chisel is being struck, cold or masonry work alike.
• Match hammer weight to the chisel and material — an undersized hammer causes fatigue and inaccuracy, not a faster result.
• Check SDS-Plus versus SDS-Max fitment against the rotary hammer before ordering or using a masonry chisel — the two systems aren't interchangeable.
• Never strike an SDS chisel manually with a hand hammer — it's designed exclusively for use in a rotary hammer.
• Never use a chisel as a screwdriver, pry bar, or punch — the edge geometry that makes it good at cutting makes it a poor and risky substitute for those jobs.
• Clear bystanders from the likely path of flying chips or fragments before starting, particularly with a chisel that hasn't been inspected recently.
• Store cold chisels and SDS chisels separately, and keep cutting edges clear of other tools, to protect the edge and avoid grabbing the wrong type for the job.

AIMS Chisel Range at a Glance

Full specifications, current stock and pricing are on the product pages in the chisels collection — this table is a quick-reference starting point, not a substitute for checking the individual product listing before ordering.

Frequently Asked Questions

What is a cold chisel used for?

A cold chisel is a hand-struck tool used to cut and shear steel and iron. Typical jobs include cutting through bolts, cutting sheet metal, removing rivet heads, and breaking welds. It's called "cold" because it cuts metal without heating it first, unlike a blacksmith's hot chisel used on heated stock. The flat cold chisel is the most commonly used form, handling the widest range of general cutting and chipping jobs in a metalworking or maintenance workshop, which is why most chisel sets are built around it rather than the narrower cross-cut or diamond-point profiles.

What's the difference between a cold chisel and an SDS chisel?

A cold chisel is a hand tool — you strike the head with a hammer, and it's used on metal. An SDS chisel has no head to strike at all; it's driven entirely by the internal hammering mechanism of an SDS rotary hammer drill, and it's used on concrete, brick and masonry rather than metal. The two aren't interchangeable, and each is designed around a completely different way of driving the cutting edge into the material — reaching for the wrong one for the job either doesn't work at all or damages the tool.

Can I hit an SDS chisel with a hammer?

No — never strike an SDS chisel with a hand hammer. SDS chisels are designed exclusively for use in a rotary hammer drill, which drives the chisel through a controlled internal hammering action. Manually striking one with a hand hammer isn't how the tool is designed to work, and risks damaging the chisel or injuring the user rather than achieving anything the rotary hammer wouldn't do faster and more safely on its own.

Can I use an SDS-Plus chisel in an SDS-Max rotary hammer?

No — SDS-Plus and SDS-Max are separate shank systems and aren't interchangeable. SDS-Plus chisels suit standard rotary hammers for everyday concrete and masonry chipping, while SDS-Max chisels are built for larger rotary hammers used on heavier demolition work. Always check which system your rotary hammer takes before ordering — it's stamped on the tool or listed in the specifications — since the two ranges can look broadly similar at a glance despite being physically incompatible.

How do I know if my chisel is still safe to use?

Inspect the head and cutting tip before every use. A mushroomed head — where repeated hammer strikes have spread the striking end outward — is a shrapnel risk and should be dressed back with a grinder and re-bevelled rather than used as-is. Tip damage causes poor cutting and increases the risk of the chisel skating or ricocheting off the workpiece under a strike, so treat a damaged tip the same way: dress it before the next job, not after it fails on you mid-cut.

What chisel do I use to remove old mortar between bricks?

A plugging chisel is designed specifically for raking mortar out from between bricks during repointing. This is a different job from cutting or splitting a whole brick, which is what a bolster chisel is shaped for — the two aren't interchangeable, even though they look broadly similar at a glance, and using the wrong one usually damages brickwork that was meant to stay intact.

What width chisel should I choose?

Match the chisel width to the groove or cutting line the job requires. Wider chisels, typically 20-25mm, suit broad surface work and general chipping. Narrower chisels, around 10-12mm, suit tight joints and precision cuts where a wider edge would damage the material either side of the cut. A multi-size set removes the guesswork for a workshop handling varied jobs rather than one repeated task.

What protective gear do I need when using a cold chisel?

Safety glasses meeting AS/NZS 1337.1 are mandatory whenever a chisel is being struck, along with leather gloves. Chip fragments and any shrapnel risk from a mushroomed or damaged head are genuine hazards during hammer-and-chisel work, and both the eyes and the hands holding the chisel are directly in the strike zone — gloves also need to fit well enough that they don't cost control over where the edge is tracking.

How do I sharpen a chisel?

Sharpening a cold chisel restores the bevel angle on a bench grinder, keeping the cutting edge square rather than rounded off to one side. It's worth dressing any mushrooming on the striking head in the same session, since both the edge and the head wear during normal use — fixing one and leaving the other means the chisel is only half serviceable for the next job.

Can I sharpen a chisel on a bench grinder?

Yes — a bench grinder is the standard way to restore a chisel's cutting bevel and dress a mushroomed striking head. Keep the chisel moving across the wheel to avoid overheating and drawing the temper out of the cutting edge, and quench periodically in water if you're removing significant material. See the AIMS Bench Grinder Guide for wheel grit selection and technique.

What hammer should I use with a cold chisel?

The hammer needs to be heavy enough to drive the chisel cleanly through the material in controlled strikes — an undersized hammer causes the chisel to bounce and skid rather than cut, which leads to fatigue and a less accurate result rather than a faster one. The right weight depends on the chisel size and the material being cut; see the AIMS Hammer Types Guide for a full breakdown of hammer types and matched weights.

What's the difference between a cape chisel and a flat chisel?

A flat (cold) chisel is the most common form and handles general cutting, shearing and chipping of steel. A cape chisel — also called a cross-cut chisel — is narrower and ground to a point along its cutting edge specifically for cutting grooves, slots and keyways, a job a flat chisel's wider edge isn't shaped to do cleanly without damaging material to either side.

Can a cold chisel cut hardened steel?

Cold chisels are designed for mild steel and iron, not hardened or heat-treated steel — driving a cold chisel into hardened stock risks chipping the chisel's own edge rather than cutting the material. If the job involves hardened steel, a cold chisel isn't the right tool for it; call our trade team to talk through the right approach for the specific material and job.

What's an air chisel bit and when would I use one instead of a manual chisel?

An air chisel bit is driven by a pneumatic air hammer rather than a hand hammer, and it suits high-volume or repetitive chipping, cutting and busting work — panel cutting, rivet busting, general demolition — where the pneumatic hammer's rapid strike rate gets through the job faster than swinging a hand hammer all day. For a single precise cut, a manual cold chisel still gives you more control strike by strike.

Do I need a different chisel for brick, concrete, and stone?

Broadly yes, though there's overlap. Bolster chisels cut and split whole bricks; plugging chisels remove mortar between bricks during repointing; SDS-Plus and SDS-Max masonry chisels handle concrete chipping and heavier demolition via a rotary hammer, and scale up with the size of the job; and mason's chisels are shaped for dressing and shaping stone specifically, generally struck with a mallet rather than a steel hammer to control how much material comes away with each strike.

What does CRV (chrome vanadium) mean on a chisel, and why does it matter?

Chrome vanadium (CRV) is a steel alloy used in quality cold chisels for its balance of hardness and shock resistance under repeated hammer impact. A chisel that's too hard at the striking head will crack or shatter under strikes; one that's too soft mushrooms quickly and needs dressing far more often. CRV construction is chosen specifically to hold up to repeated impact without failing at either extreme, which is why it's the standard material across quality cold chisel ranges rather than a premium upgrade.

Is it better to buy a chisel set or individual chisels?

A set suits a workshop that doesn't yet know exactly which sizes it needs most, since it covers a working range in one purchase without guessing. Buying individually makes more sense once a workshop has a settled sense of which sizes actually get used, letting you replace a worn chisel or add one missing size without duplicating what's already on hand and sitting unused in the tool roll.

Do chisels rust, and how should they be stored to prevent it?

Yes — carbon and CRV steel chisels will surface-rust like any other unprotected tool steel if left damp or exposed to humid air for extended periods, particularly around the cutting edge where the metal has been freshly ground. A light wipe with an oily rag before storage, keeping chisels in a dry tool roll or drawer rather than left on a damp bench, and avoiding contact with other bare steel tools all reduce the risk. Light surface rust can generally be cleaned back on a grinder or with an abrasive pad without affecting the chisel's performance, provided it's caught before it pits the cutting edge.

People Also Ask — Chisels

Q: What is the best hammer weight to use with a cold chisel?

There's no single correct weight — it depends on the chisel size and the material being cut. What matters is that the hammer is heavy enough to drive the chisel through the material in clean, controlled strikes rather than bouncing off it, since an undersized hammer causes fatigue and inaccuracy rather than a faster cut.

Q: Why does a chisel head mushroom over time?

Repeated hammer strikes gradually spread the striking end of the chisel outward, forming a mushroomed edge. This is normal wear on a regularly used chisel, which is why the head needs periodic dressing on a bench grinder rather than being left to spread indefinitely until fragments start shearing off under impact.

Q: Is an SDS chisel the same as a jackhammer bit?

They're closely related but not identical — SDS chisels fit the SDS-Plus or SDS-Max shank system used on rotary hammer drills, while larger demolition jackhammers typically use a different, heavier shank system built for a bigger class of machine entirely.

Q: Can I use a cold chisel without a hammer?

No — a cold chisel does no cutting on its own. It relies entirely on repeated hammer strikes to drive the cutting edge into the material, which is what distinguishes it from an SDS or air chisel, both of which are driven by a powered mechanism instead of a swung hammer.

Q: What's the difference between a chisel and a punch?

A chisel has a sharpened cutting edge and is used to cut, shear or chip material away. A punch has a pointed or shaped tip and is used to mark, drive out, or displace material — such as a centre punch marking a drill start point, or a pin punch driving out a retaining pin — rather than cutting it. See the AIMS Centre Punch & Scriber Guide for the punch side of the range.