Witte screwdriver bits are made to very exacting standards to ensure maximum transmission of torque to the screw. this is achieved by a special hardening process & an exact fit of the bit to phillips screws. In addition there is a special recessed neck called the flex-zone which absorbs shock loads thus giving increased durability. there is also a special coating of titanium nitride on the bit which increases their wear resistance.
strip of 10 bits.
6.5mm slotted x 50mm with 1/4in hexagon drive.