This lock, 5201, is a lock for all 2 inch receiver hitches. This is a simple padlock style lock. What you do to operate it is pull the protective cover off, take the key and give it a little bit of a turn. Then it comes right apart just like that. Now well show it installed on a 2 inch receiver hitch. To install just slide your pin in, just take the padlock itself, and it snaps into place. Put your protective cover on and your set to go. That covers it for part # 5201, along side of this model is part # 5200 also from Titan that fits on all 1 1/4 inch receiver hitches.