Buy Security Bits Online in Australia
AIMS Industrial stocks security bits for the two tamper-resistant drive profiles trade and maintenance teams ask us for most: snake-eye (spanner-drive) bits from Wiha and Hobson, and pin-drive security insert bits from Alpha. All three ranges share a 1/4" hex shank, so they drop straight into the impact drivers, drill-drivers, and bit holders you're already using. Need a profile we don't list here — Torx security, tri-wing, or pentalobe? Get in touch and we'll help track it down. For more on selection, see our Torx Bit Sizes Guide.
Quick Reference
| Product | Brand | Drive Profile | Shank | Sizes Available | Impact Rated |
|---|---|---|---|---|---|
| Spanner Insert Bit | Wiha | Spanner / snake-eye (pin-spanner) | 1/4" hex | 4, 6, 8, 10 mm | No — standard |
| Eye Drive Security Socket Bit | Hobson | Snake-eye (eye-drive, two-pin) | 1/4" hex | No.6 – No.14 | No — standard |
| Pin Drive Security Insert Bit | Alpha | Pin-drive (pin security) | 1/4" hex | No.4 – No.14 | Yes — impact-rated |
Security bit profiles we stock
Snake-eye / spanner-drive bits (Wiha, Hobson)
Snake-eye fasteners — also called spanner-drive or two-hole security screws — have two small round holes either side of the fastener centre instead of a standard recess. The bit engages both holes with two pins, so only a matching snake-eye bit will turn the fastener. It's a common choice on public-area fittings and equipment where you want a fastener that a screwdriver or standard bit simply can't grip.
Wiha's Spanner Insert Bit is precision-machined in Germany and available in 4, 6, 8 and 10 mm sizes. Hobson's Eye Drive Security Socket Bit is a plain-finish alternative in the more common screw-gauge sizes, No.6 through No.14 — handy for matching against imperial and gauge-sized snake-eye screws already on site.
Pin-drive security insert bits (Alpha)
Pin-drive bits carry a small centre pin that locates in a corresponding hole in the fastener head, preventing standard bits from seating and driving the screw. Alpha's Pin Drive Pin Security Insert Bit is impact-rated, so it holds up under an impact driver rather than just a hand screwdriver or drill-driver — useful where security fasteners need to be driven or removed at pace on site. It's stocked in No.4, No.8, No.10, No.12 and No.14 to match common security screw gauges.
Where security bits are used
- Public and semi-public fittings — washroom partitions, signage, and street furniture where fasteners need to resist casual tampering
- Vending and access equipment — panels and enclosures that should only open with the matching bit on hand
- Maintenance and facilities work — reinstating security fasteners that were removed for servicing, using the same profile they were installed with
- General trade and workshop use — keeping a small security bit set on hand for jobs that turn up unannounced
Choosing the right security bit
Match the drive profile and size to the fastener exactly — snake-eye bits won't touch a pin-drive fastener and vice versa, and an undersized or oversized bit within the same profile will slip rather than seat. If you're not sure which profile is already installed, a quick photo of the fastener head to our team is usually enough for us to point you to the right bit. For impact driver use, reach for the Alpha pin-drive bit; the Wiha and Hobson snake-eye bits are built for hand and drill-driver use.
Companion Collections
- Security Fasteners — the fastener side of the range these bits are built to drive
- Security Screws
- Security Nuts & Clips
- Screwdriver Bits — the full bit range beyond security profiles
- Shop Wiha
- Shop Hobson
- Shop Alpha
Order from AIMS
Not sure which profile or size you need, or after a quantity that isn't listed? Our team can match a security bit to the fastener you're working with and get it moving from our Sydney warehouse.
- Call us on (02) 9773 0122
- Contact our team
- Request a quote
Frequently Asked Questions
What are security bits used for?
Security bits drive tamper-resistant fasteners — screws with a drive profile that a standard screwdriver or bit can't grip. They're used anywhere a fastener needs to resist casual removal, such as public fittings, access panels, and equipment enclosures.
What's the difference between a snake-eye bit and a pin-drive bit?
A snake-eye (spanner-drive) bit has two pins that locate in two holes either side of the fastener head. A pin-drive bit has a single centre pin that locates in one hole in the middle of the fastener head. The two profiles aren't interchangeable — you need the bit that matches the fastener already installed.
What shank size do AIMS security bits use?
All three security bits we stock — from Wiha, Hobson and Alpha — use a standard 1/4" hex shank, so they fit standard bit holders, drill-drivers and impact drivers.
Can I use these bits with a hand screwdriver, or do I need a power tool?
The Wiha spanner insert bit and Hobson eye drive socket bit are standard bits suited to hand and drill-driver use. The Alpha pin-drive bit is impact-rated, so it's built to handle sustained use in an impact driver as well as a drill-driver.
What sizes are available?
The Wiha spanner bit comes in 4, 6, 8 and 10 mm sizes. The Hobson eye drive bit and Alpha pin-drive bit are both sized No.6 to No.14 and No.4 to No.14 respectively, in screw-gauge sizing.
How do I know which profile my security fastener needs?
Look at the fastener head: two small holes either side of centre means snake-eye/spanner-drive, a single hole in the middle means pin-drive. If you're unsure, send our team a photo of the fastener and we'll confirm the right bit.
Do you stock matching security fasteners as well as bits?
Yes — see our Security Fasteners, Security Screws and Security Nuts & Clips collections for the fastener side of the job.
Can I order bulk or trade quantities?
Yes — call us on (02) 9773 0122 or submit a request a quote and we'll confirm pricing and lead time for the quantity you need.