Buy Hex Power Bits Online in Australia
Hex Power Bit Quick Reference
Hex (Allen) power bits drive socket head cap screws and internal hex fasteners with impact drivers, drill drivers or screwdrivers — replacing manual Allen keys for power assembly work. Selection turns on bit format (insert vs power), size (matched to fastener), and durability (standard vs impact-rated).
| Bit Format | Application | Best For |
|---|---|---|
| Insert Bits (25 mm) | Use with magnetic bit holder or quick-change chuck | Workshop default — interchangeable in standard holder, lowest cost per bit |
| Power Bits (50-75 mm) | Direct hex shank — drops straight into driver chuck | Production work, high-volume fastener driving |
| Impact-Rated Bits | Heavy-duty alloy steel for impact driver use | Impact wrenches — NEVER use standard insert bits in impact drivers (they shatter) |
| Ball-End Bits | Allows up to 25° off-axis driving | Awkward-access fasteners, side-approach screwing |
| Long Bits (100-150 mm) | Extended reach into recessed pockets | Machine assembly, deep-hole fastener driving |
| Pin Hex (Tamper-Proof) | Centre pin requires matching tamper-proof bit | Security fastener removal — see security fasteners |
Sizes stocked: H1.5, H2, H2.5, H3, H4, H5, H6, H8, H10 metric. Imperial: 1/16" through 1/2". For Allen key sizes by socket cap screw, see our socket head cap screw guide. Companion ranges: screwdriver bits, hex keys / Allen keys, impact drivers.
Hex Power Bits for Impact Drivers & Drill Drivers
Hex (Allen) power bits drive socket head cap screws and other internal hex fasteners using a power tool — impact driver, drill driver or screwdriver — rather than a manual Allen key. They convert the hex socket fastener into a fast power-driven operation, which is essential when assembling large numbers of machine screws, deck-board fasteners, equipment frames or any fastener-intensive build. For socket head cap screw selection, head types, grades and torque values, see the Socket Head Cap Screw Guide.
Insert bits vs power bits — what's the difference
Insert bits are short bits (25 mm) designed to fit into a separate bit holder. Power bits are longer (50–150 mm) with the bit and shank as one piece, designed for direct chuck or impact-driver collet fitment. Power bits are stiffer in extension and don't suffer the runout that a poorly-fitted insert bit can develop. For fastening at depth (deep counterbores, recessed pockets) longer power bits give the reach a standard insert bit cannot.
Standard hex vs ball-end hex
Standard hex bits engage the fastener squarely and transmit full torque — used for installation and removal at correct alignment. Ball-end hex bits have a spherical tip that allows the bit to engage the fastener at angles up to ~30° off-axis — useful for fasteners in awkward positions where the driver can't sit square. Ball-end bits transmit less torque (typically 75-85% of standard hex) so use them for access rather than maximum torque applications.
Tamper-resistant (security) hex bits
Some hex fasteners use a centre-pin in the socket to defeat standard hex bits — these "security hex" or "pin-in-hex" fasteners are common on machine guards, restroom hardware and public-facing installations. AIMS stocks security hex bits with the centre hole that engages over the fastener pin, allowing legitimate maintenance access.
Sizing and brands
The hex power bit range covers metric sizes (M3–M19) and imperial sizes (1/8"–3/4") in 1/4" hex drive standard. Brands include Alpha, Bordo, Wiha, Sutton, Bondhus and Hobson — across general-trade and industrial-grade specifications. See related screwdriver bits for Phillips, Torx, square and other drive types, or impact drivers for the tool to drive them with.