Spanner Driver Bits
Spanner Bits for Snake-Eye Security Screws
Spanner bits drive security screws with two holes in the head, often called snake-eye screws. They turn up on restroom partitions, elevator panels, signs, and public fixtures. This collection carries Wera 857 Z spanner bits in short 25 mm and long 89 mm lengths, Wiha insert bits in 2- and 10-packs and spanner power blades, Bosch Extra Hard gold bits, and Irwin insert bits. A Festool 3-piece socket spanner nut driver set is also listed.
What to Look For
- Size. Match the bit to the screw size. Bits here run sizes 4 through 10.
- Length. Short 25 mm and 1-inch inserts go in a bit holder. Wera 89 mm bits reach recessed screws.
- Pack count. Maintenance crews can buy Wiha 10-packs. Single bits suit occasional use.
- Wiha power blades. Spanner power blades fit Wiha interchangeable handles.
Shop spanner driver bits at The Tool Nut, an authorized dealer since 1994, with free shipping on most orders and rewards points on every purchase.
Spanner Driver Bits FAQ
What is a spanner screw?
A tamper-resistant screw with two round holes in the head. A standard screwdriver cannot turn it. A spanner bit has two pins that fit the holes.
Do I need a special holder?
No. The bits here use a 1/4-inch hex or Wera Z drive and fit a standard bit holder or driver. Use a magnetic holder to keep short inserts from falling out overhead.