Bosch Square Extra Hard Robertson Screwdriver Bit

This Bosch Extra Hard Robertson screwdriver bit in R1 Square, 50mm length, supplied as a pack of 3, is suited to smaller square-drive screws. The longer 50mm length gives extra reach for recessed or hard-to-access fixings. The pack of 3 provides handy spares. The bit is made from S2 Modified Steel and an optimised heat treatment process for extra-hard quality, and can be used with screwdrivers and drill drivers. The tapered torsion zone absorbs force and vibrations, so it copes easily with torque peaks during screw-driving.