Bosch Hex Extra Hard Screwdriver Bit

The Bosch Extra Hard Screwdriver Bit in Hex 4mm, 50mm length, comes in a pack of 3. The extended 50mm length helps you reach fixings that sit deeper or are harder to get at. The bit is made from S2 Modified Steel with an optimised heat treatment process, giving extra-hard quality for universal use. A tapered torsion zone absorbs force and vibrations when screw-driving, coping easily with torque peaks. The ¼-inch external hex shank is designed for screwdrivers and drill drivers.