Milwaukee Shockwave Impact Duty ECX Driver Bits are engineered for extreme durability and up to 10x life. ECX Driver Bits are a combination of Philips, 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 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. Broadly targeting cordless users, the Shockwave Impact Duty accessory line is not only ideal for heavy duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.