I use this lock and works great.

Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT https://www.amazon.com/dp/B01MYCT0LG...DCMT8AGQZDY7ZM

Boat is in our driveway so I do the same as above. Park truck close up to hitch and lock it. Almost (although not exclusively) impossible to steal boat.


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