This Sutton Tools Screwdriver Bit is built with a phillips tip; the most widely used drive system in the world. It is designed to absorb torque peak, reducing slippage and breakage, and made with tough grade high-alloy Chrome Vanadium steel absorbs shock and offers superior performance. It also has a magnetic tip that increases productivity and eliminates frustration when working at awkward angles or in tight spaces. These are torque tested to exceed DIN standards by up to 330%. Equipped with a 1/4" hex shank with power groove for use in impact drivers and quick change adapters.