This extra hard screwdriver bit is a great choice for general tasks. S2-modified steel and an optimized heat treatment process provide above-average hardness for adequate performance in all types of work. The tapered torsion zone of the bit effectively handles torque peaks, as it absorbs forces and vibrations while driving screws. This makes it suitable for a variety of tasks. It features a 1/4-inch external hex shank for general screwing work with screwdrivers and drill drivers. This sturdy and compact set comes in a transparent storage box that allows for good visibility as well as safe storage and transport. Length mm: 49.