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 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 on the bit which increases their wear resistance.
Packed 2 to a card the bits have 1/4in hexagon drive and are 25mm long.
Also available in plastic boxes suitable for the consumer.