Milwaukee SHOCKWAVE Impact Duty ECX Driver Bits are engineered for extreme durability and up to 10x life. ECX Driver Bits are a combination of Phillips, Square Recess and Slotted tips designed for superior grip to eliminate rounding out fastener heads. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE Impact Duty ECX 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. Bullets: Geometric design provides the shock absorption Proprietary steel and heat treet process for maximum strength and durability Forged tips for maximum grip 93322