OTC (6921 2-1/2&rdquo; Hex Locknut Socket For Rear Axles and Various Front Axle Applications On Light-Duty Trucks 2-1/2 inch hex locknut socket Designed for use on the hex nut found on rear axles and various front axle applications on light-duty trucks Features a 1/2 inch square drive Can be used with an extension and torque wrench for accurate tightening Backed by the famous OTC Lifetime Marathon Warranty against defects in materials and workmanship