Impact Tough design – provides 10X life over standard bits, with an Xtended Torsion Zone, hardened core and precision tip Xtended Torsion Zone – helps to absorb the torque peaks of impact drivers to avoid breakage Precision-engineered bit tips – deliver a better fit and less cam-out Heat-treated bit manufacturing – provides stronger bit Hex interface – made to fit 1 4 In. hex impact drivers Hardened-core manufacturing – increases bit strength High-quality forged steel – supplies durability for long accessory life Laser-etched markings – lasts for the life of bit, and they’re easier to read