Curt® Heavy-Duty 5/8" Hitch Pin with Groove. Fits any 3" x 3" receiver tube opening with a 5/8" pin hole. Tested and rated to 21,000 lbs GTW. High-strength steel construction with zinc-plated finish. Secures ball mounts and other receiver tube inserts. Grooved pin allows clip attachment at any angle. Bent handle for an easier grip. Limited lifetime warranty (one-year finish, one-year parts). Retainer clip included.