Master Lock - 3 Trailer Locks Keyed Alike 3KA-379-37 Complete trailer security. These locks will fit virtually all trailers that have 1-7/8", 2" or 2-5/16" couplers. Please check/read the SEE MORE PRODUCT DETAILS below for important receiver lock fitment information. Also IMPORTANT- please read latch padlock features below in the description. Limited Lifetime Warranty on all locks in this set. KEYED ALIKE - One key opens all three locks. We can key multiple sets to the same key number. If multiples are ordered we will automatically key them all the same. Each lock comes with two keys, for a total of six keys. COUPLER LOCK FEATURES: This black coupler lock is very difficult to defeat, by virtue of how the top of the lock rests on the top of the coupler, withstanding downward forces. See second image. The lock will also rotate if hit hard, with no rigidity the lock is tougher to defeat. Advanced locking mechanism resists picking and prying. Simple installation and removal. Rekeyable cylinder for keyed alike convenience. RECEIVER LOCK 1480KA FEATURES: Protects from theft when securing the ball mount to the receiver. The lock features the NEW Push To Lock Security. Push lock body onto pin firmly and remove key. Stainless Steel for ultimate corrosion resistance. Water tight cap protects lock. Solid brass lock cylinder and aluminum cylinder case offer extreme corrosion resistance. 5/8 diameter pin fits 2in receiver tubes, Class III/IV. 10,000 lb load rated. The shaft's length is exactly 2-3/4 long. LATCH PADLOCK FEATURES: Please read PRODUCT DETAILS below for important latch lock fitment information. This latch lock features an Armored Gaurd Shackle that prevents bolt cutter attacks. A removable, and revolving case-hardened steel shackle sleeve resists cutting/sawing. Sleeve off - secures coupler latches. Sleeve on - works best with hasps. 1-9/16 (40mm) wide laminated steel body, 9/32 thick hardened steel shackle for extra cut resistance. Proprietary rustproofing for longer life.