Geinxurn Impact Double End Screwdriver Bit Set 6 inches Standard PH2-PH2（Notice:Please make sure your driver chuck suit for use the double-end screwdriver bit.）Torsion zone absorbs the torque peaks of impact drivers to avoid breakageThis Bit owned strong magnetic to pick up and hold screws easily with no slipping or stripping Precise tip-end machining,More closed to Fit,More safety and more durableThis 2-sizes-in-1 head reversible screwdriver bit made of S2 high quality steel material, it owns the features of high hardness and good toughness and resistance through strictly heat treatment, durable and suitable for any industrial useDouble-Ended:Versatile & EfficientS2 Alloy Steel,It owns the features of high hardness and good toughness and resistance through strictly heat treatment, durable and suitable for any industrial useAmerican type bit heads are specifically designed to meet the standards and requirements of impact drivers commonly used in North America. These bits feature robust construction, precise engineering, and compatibility with popular screw typesA durable plastic case and plastic lid for easy viewing,easily take away with simple pushWidely use