Milwaukee SHOCKWAVE Impact Duty driver bit sets are engineered for extreme durability and up to 10x life. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE Impact Duty insert and driver bits feature an innovatively designed geometric shock absorption zone to extend life. The forged tip allows for a secure grip and maximum contact eliminating stripping or slipping. Engineered to be extremely durable Each impact driver bit features Wear Guard Tip(TM) that delivers increased wear resistance, protecting the fit over the life of the bit; precise fit custom machined tip prevents stripping and reduces wobble Driver bits have optimized Shockzones(TM) for each tip type and length of the driver bit to absorb peak torque and prevent breaking Laser hardening at the tip creates an outer protective shield for improved wear resistance Features laser etched size for easy identification Made of Custom Alloy76(TM) steel 32 pieces