REYSUN specializes in the design and production of trailer hitch accessories. It has a professional team and experienced technical personnel who can provide customers with high-quality and innovative products including ball mount, hitch receiver tubes, hitch balls, hitch lock pins and other towing accessories. Reysun trailer coupler lock contains 1 piece of Aluminum die casting lock body and 1 piece of a heavy duty steel lock bar and 2 steel keys. The trailer hitch ball coupler lock fits 1-7/8", 2" and 2-5/16" trailer tongue coupler.