The DeadBolt / CT Johnson Hitch and Trailer Anti-Theft Lock Kit provides ultimate protection for trailer towing and storage. This lock kit includes the Blockhead Trailer Coupler Lock, Adjustable Trailer Coupler Latch Lock, Receiver Hitch Lock, and two keys. One key fits all three locks for convenience.• Trailer coupler lock fits 2-5/16" flat lip couplers (4-1/2" max. width)• Trailer coupler latch lock adjusts from 1/2" to 2-1/2" opening• Receiver hitch lock is 5/8" dia. and fits all Class III and IV hitches Trailer Coupler Latch Lock adjusts from 1/2"" to 2-1/2"" opening Receiver Hitch Lock fits all Class III & Class IV hitches Includes two keys that each fit all three locks | C.T. Johnson DeadBolt / CT Johnson Hitch and Trailer Anti-Theft Lock Kit, 2-5/16"