Universal Hitch & Trailer Anti-Theft Lock Kit (TSK3-AS) by DeadBolt. Fits 2-5/16 Flat Lip Couplers. Ultimate Protection for trailer towing and storing. One key fits all three. DeadBolt new Hitch & Trailer Anti-theft Lock Kit is an all-in-one towing solution. Imagine using one key to lock your hitch and trailer when towing or storing. Value, security and convenience in one package. Ultimate Protection for trailer towing and storing. One key fits all three. DeadBolt new Hitch & Trailer Anti-theft Lock Kit is an all-in-one towing solution. Imagine using one key to lock your hitch and trailer when towing or storing. Value, security and convenience in one package. more details on - https://www.carid.com/deadbolt/hitch-trailer-anti-theft-lock-kit-mpn-tsk3-as.html