Feature: * Made from Industrial Grade S2 Tool Steel, Heat Treated to HRC58-66 * Anti Cam-out bit allow precise fit and resist slippage * Inward grooves on shaft reduces the level of impact from sudden locking, reducing stripping, increases bit life * 1/4" hex power shank fits most chucks and adapters * Up to 60% more durable than similiar products * Fixed with Air/Pneumatic Screwdriver, Hand Electric Drills