Total Trailer Security Keyed Alike - One key opens all six locks. Each lock comes with two keys, for a total of ten keys. Multiple 5KA trailer lock packages CAN be keyed alike. If you ordered a quanity of 2, 3 etc we would automatically key them all the same. 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 10 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. Rekeyable. Advanced locking mechanism resists picking and prying. Simple installation and removal. Resists rust and corrosion. Limited Lifetime Warranty. PADLOCK FEATURES: 7/8" (21mm) Armored Shackle Guard helps block 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. LATCH PADLOCK FEATURES: 1-9/16" (40mm) wide laminated steel body for superior strength. Keyed Alike A 9/32" thick hardened steel shackle for extra cut resistance. 4 pin cylinder helps prevent picking. Dual locking levers provide extra pry resistance. Thousands of key changes maximize key integrity. Proprietary rustproofing for longer life. Hardened steel bottom plates for drill resistance. 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.