The 10 piece set is for use with Allen Head screws. Can be used in drills, power ratchets, and 1/4" drive cordless screwdrivers. Use 1/4" square adaptor to drive bit tips with any power or hand ratchet.
- Works with hex head fasteners, also known as Allen wrench.
- Must-have set for automotive, bike, appliance repair.
- Hex shank fits all 1/4-inch driver handles, extensions & adapters.