Impact Tough, 5/16" x 1-7/8", Magnetic, Nutsetter,10X Life Over Standard Impact Bits, X-Tended Torsion Zone Helps To Absorb High Torque Of New Impact Drivers, Precision Engineered Tips For A Tighter Fit & Less Cam Out, Heat Treated Manufacturing For Stronger Bit, High Visibility Sleeve With Laser-Etched Markings For User Convenience.