S105 Phillips Screwdriver Bits Bulk Phillips screwdriver bits are the most widely used drive system in the world. The design absorbs torque peak reducing slippage and breakage. Sutton Tools Supabit Extreme Impact Bits Certified heavy hitters specifically developed for use with the high-torque output of an impact driver. Phillips tip: the most widely used drive system in the world Magnetic tip increases productivity and eliminates frustration when working at awkward angles or in tight spaces 3X torque: Torque tested to exceed DIN standards by up to 330% 1/4" hex shank with power groove for use in impact drivers and quick change adapters. 1/4" hex insert with retaining notch for use in bit holders and hand drivers Cold forged from premium shock-resisting S2 tool steel with a hardness of 58-62HRC for superior strength Manganese Phosphate coating for highest hardness and superior corrosion and wear resistance