It features a 1/4-inch external hex shank for general screwdriving tasks with screwdrivers and drill drivers. This extra hard screwdriver bit is a great choice for general work. S2-modified steel and an optimized heat treatment process provide above-average hardness for adequate performance in all types of tasks. The conical torsion zone of the bit effectively handles torque peaks, as it absorbs forces and vibrations while driving screws. This allows it to tackle a wide range of jobs.