Curt Manufacturing 16121 Trailer Hitch Ideal for towing 5th wheel trailers up to 16,000 lbs. High-strength, interlocking cast jaws fully wrap the kingpin Fully articulating torsion head for controlled coupling and stable towing Cast yoke, with poly-torsion inserts, suppresses shock loads and reduces noise Lockable handle self-resets to the ready-to-couple position after uncoupling