CT Johnson Steel Receiver Hitch LockHeavy duty lock fits all Class III & Class IV 2" x 2" square receiver hitches and trailer ball mounts with 5/8" diameter pin hole. Patented "Direct Drive" locking mechanism resists rust, corrosion & clogging. Soft-to-the-touch end cap provides comfortable grip even in cold weather. Reversible key makes insertion simple, even with gloves on. Pick from Solid machined stainless steel or chrome plated construction and a shuttered key cylinder.