Up to 70x longer life than standard impact rated driver bits. Up to 33% stronger IMPACTive™ alloy steel extends tool life in high torque impact applications. Progressive Torsion Zone actively flexes to dissipate peak impact forces preventing fastener recess damage and tip breakage. Multi-stage heat treatment process provides an optimal blend of bit hardness and durability. Impact rated 1/4″ speed hex is ideal for use in high torque impact drivers and conventional rotary drills.