3pc Chrome Trailer Lock Set - This lock set is keyed alike and will address all of your trailer security needs - includes coupler, coupler latch and rceiver lock. They all come packaged in a durable canvas storage bag. Trailer coupler lock fits 1-7/8 inch, 2 inch and most 2-5/16 inch couplers. Push to Lock receiver lock fits both 1/2 inch and 5/8 inch receivers. Stainless steel trailer coupler latch lock is adjustable from 9/16 inch to 2-3/4 inch. These locks use a K1 Key Blank. All Master Lock padlocks are individually tested for strength and durability, and offer a limited lifetime guarantee.