Best Trailer Coupler Locks

AMPLOCK Standard Series (2'' Trailer Coupler Lock)

Master Lock 379ATPY Universal Trailer Coupler Lock

Trimax UMAX100 Premium Universal 'Solid Hardened Steel' Trailer Lock (fits all couplers)

Proven Industries Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Blue)

Proven Industries Model 2178 Trailer Lock, Fits Specific 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)

RETRUE Universal Coupler Lock Heavy-Duty Trailer Coupler Locks Ball Hitch Tow Hitch Lock for 1-7/8 Inch, 2 Inch, 2-5/16 Inch Couplers, Grey

Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT

PEAKTOW PTS0002 Heavy Duty Universal Adjustable Coupler Lock Trailer Hitch Storage Security Lock Fits 1-7/8, 2, 2-5/16 Inches Couplers

Trimax TCP100 Keyed Alike Combo Pack

Master Lock Trailer Lock, Trailer Coupler Lock, Fits 2-5/16 inch Couplers, 378DAT