This Sutton Tools Screwdriver Bit has a Phillips tip which absorbs torque peak reducing slippage and breakage. The double ended design provides 2X tool life compared with single ended bits. It also has a magnetic tip that increases productivity and eliminates frustration when working at awkward angles or in tight spaces. Has a Manganese Phosphate coating for highest hardness, superior corrosion, wear resistance, and torque tested to exceed DIN standards by up to 330%. Has a 1/4 hex shank with power groove for use in power tools and quick change adapters. - Magnetic Phillips tip - Manganese Phosphate coating - Torque exceeds DIN standards by up to 330%1/4 hex shank with power groove