Master Lock Trailer Lock Universal Trailer Coupler Lock 379DAT Silver Standard

Best used for vehicles, trailers, and RV hitch locks, Trailer hitch lock is easy to install and remove, Trailer coupler resists rust and corrosion; Advanced locking mechanism resists picking and prying, Fits most 1-7/8 in. (48 mm), 2 in. (51 mm) and 2-5/16 in. (59 mm) couplers: Reese, Fulton, Valley, Atwood, Shelby, Putnam, Hammerblow, Dutton Lainson, UFP, Includes one coupler lock, two keys