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. Latch lock doesn't fit some 2-5/16" couplers. See description below for latch lock (#37) applications. For 2-5/16 couplers the better lock set is: Master Lock - 6 Trailer Locks Keyed Alike 6KA-37937-3 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. 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. 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 helps block bolt cutters. Revolving, case-hardened steel shackle sleeve resists cutting and sawing. Removable shackle sleeve. Sleeve off - Secures coupler latches. Sleeve on - Works best with hasps. Key retaining feature ensures padlock is not left unlocked. LATCH LOCK FEATURES: This trailer lock is NOT recommended for all 2-5/16" couplers. The issue being the #37 lock, it will fit some 2-5/16" couplers, the exception being 2-5/16" couplers that have the latch partially recessed from the top surface of the coupler, or latches that are wider than 7/8". The #37 lock works well on 1-7/8" and 2" couplers. 7/8" (21mm) Armored Shackle Guard blocks bolt cutters. Removable shackle sleeve. Sleeve off - Secures coupler latches.