This Craftsman® Impact Rated™ Hex screwdriving bits kit is designed to screw using an impact driver. Made in S2 modified steel, these bits have a torsion zone that absorbs the impacts and prevent the bit from breaking. They are strong enough to resist wear for many years. The tip is CNC-machined for higher precision and to prevent cam-out. These tips are designed for wood applications and come in a set containing 1 hex 1"8" bit and 1 hex 5/32" bit.