These heavy-duty locknut sockets are a new addition to the OTC line of task Tamers. These are not light-hearted sockets. They feature a 1/2" square drive and can be used with an extension and torque wrench for accurate tightening. They are for use on rounded or standard hex nuts found on the most popular light-duty trucks on the road. Unlike the competition, these sockets are backed by the famous OTC Lifetime Marathon Warranty against defects in materials and workmanship. Designed for use on front wheel adjusting nuts found on Toyota FJ, LN, and RN models.