Witte screwdriver bits are made to very exacting standards to ensure maximum transmission of torque to the screw by a special hardening process and 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 which increases the wear resistance of the Bitflex Phillips.Witte Phillips Titanium Coated Screwdriver Bits Size: Phillips No.1pt.Length: 25mm.Drive: 1/4in Hex Drive. Pack Size: Card of 2.