Features and Benefits: Enhanced open end design with Surface Drive Technology that prevents fastener rounding; Delivers up to 25% more torque; Non ratcheting offset box end; Size stamped on both sides for easy identification; Surface Drive PlusT on Open End: Stronger Grip, Reduces Fastener Rounding, Up to 25% More Torque; Enhanced open end design with Surface Drive Technology that prevents fastener rounding Delivers up to 25% more torque Non ratcheting offset box end Size stamped on both sides for easy identification