Impact Tough, 1/4" x 2-9/16", Magnetic, Nutsetter, 10X Life Over Standard Impact Bits, X-Tended Torsion Zone Helps To Absorb High Torque Of New Impact Drivers, Advanced Design Provides Secure Fit, Heat Treated Manufacturing For Increased Durability, High Visibility Sleeve With Laser Etched Markings For User Convenience.