Total Trailer Security Keyed Alike - One key opens all six locks. Each lock comes with two keys, for a total of twelve keys. PLEASE UNDERSTAND - each lock comes with different looking keys but thay are the same key code. GUARANTEED that all locks will be keyed the same or we will fix the problem at our expense. Multiple 6KA trailer lock packages CAN be keyed alike. If you ordered a quanity of 2, 3 etc we would automatically key them all the same. See RECEIVER LOCK options in the description below. PADLOCK FEATURES: 1-9/16"(21mm) wide x 3"(76mm) high. Armored Shackle Guard blocks bolt cutters. Revolving, case-hardened steel shackle sleeve resists cutting and sawing. Removable shackle sleeve. Sleeve off - Secures coupler latches to accommodate openings 9/32" (7mm) in diameter. Sleeve on - Works best with hasps, fits openings 1/2" (13mm) in diameter or larger. Precision pin tumbler mechanism resists picking. KEY RETAINING - ensures that padlock is not left unlocked. LATCH LOCK FEATURES: This latch/lever lock, model 3KALFBLK is required for the 2-5/16" couplers, it will also work with the 1-7/8" and 2" size. 1-1/2" Long shackle, 1-9/16" (40mm) wide laminated steel body, 9/32" thick hardened steel shackle for extra cut resistance. Coupler lock fits 1-7/8", 2" & 2-5/16" couplers. See the description below for the majority of coupler manufacturers this lock will fit. If only wanting TWO #37 padlocks, and not three, we will credit you back $14.00 after the transaction is paid for. Please indicate the adjustment after the purchase. Complete trailer security needing only one key. This lock combination listing comes with 12 keys. COUPLER LOCK FEATURES: This lock protects unattended trailers and guards against tow-away theft. Fits 1-7/8", 2", & 2-5/16" couplers by Reese, Fulton, Valley, Atwood, Shelby, Putnam, Hammerblow, Dutton, Lainson, and UFP. Advanced locking mechanism resists picking and prying. Simple installation and removal. Resists rust and corrosion. RECEIVER LOCK FEATURES: The shaft's length is exactly 2-3/4" long. (check your receiver tubes width). If your receiver requires the LONGER PIN (1469KA) please indicate after the purchase and we can make the change. Protects from theft when securing the ball mount to the receiver. The receiver hitch lock features the NEW Push To Lock Security. Push lock body onto pin firmly and remove key. Stainless Steel for ultimate corrosion resistance. 5/8" diameter pin fits 2" receiver tubes, Class III/IV. 10,000 lb load rated. PADLOCK FEATURES: 7/8" (21mm) Armored Shackle Guard blocks bolt cutters. Keyed Alike Revolving, case-hardened steel shackle sleeve resists cutting and sawing. Removable shackle sleeve. Sleeve off - Secures coupler latches. Sleeve on - Works best with hasps. Precision pin tumbler mechanism resists picking. Limited Lifetime Warranty. Thousands of key changes maximize key integrity. Dual Locking levers provide extra pry resistance. Proprietary rustproofing for longer life. HARDENED steel bottom plates for drill resistance.