This Craftsman® Impact Rated™ Torx 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 Torx 15 bit, 1 Torx 20 bit, and 1 Torx 25 bit.