Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA

Customers find the trailer hitch lock secure against theft and appreciate its durability, describing it as 100% unbreachable and well-constructed. Moreover, the lock is easy to use, with one customer noting it comes off and goes on with the key easily, and they consider it good value for money. However, the fit and lock performance receive mixed feedback - while some say it fits aluminum Cherokee trailers well, others report it doesn't work with 2 5/16 couplers with flange, and while some find it easy to lock and unlock, others mention it's very easy to defeat.