Can be used with an extension and torque wrench for accurate tightening. Works on 3/4- and 1 ton Ford F-250 and F-350 trucks with automatic locking hubs. Weight: 1 lb., 8 oz This heavy-duty locknut socket is a new addition to the OTC line of task Tamers. For use on rounded or standard hex nuts found on the most popular light-duty trucks on the road. Unlike the competition, this socket is backed by the famous OTC Lifetime Marathon against defects in materials and workmanship.