Strong Compatibility: wrench extender tool is compatible with 1 / 2″ drive breaker or 21mm drive， wrench extension adapter is compatible various cheater, ratchet wrench : wrench extender is upgraded, heat-treated high carbon steel, with resistance and durability The black coating on the surface of the wrench extender adaptor can effectively rust and Easy Work: Wrench extension tool allows you to extend the wrench and easily tighten or loosen rusty bolts or over-tightened as a fulcrum Strong Torque: Extension wrench adaptor is a lengthened wrench tool used to lift the lever force wrench extender connects the rod or ratchet to the tool extend wrenches tool provides a longer lever arm to increase the torque Service: Our wrench extender tool provides there is any problem, please us replacement or full, Manufacturer: Yhplxyuus