Amazingly secure way to stop trailer thieves! One of the best locks on the market. If you only have a hitch lock, thieves can just hook up chains and/or pull your trailer onto a flatbed. If you have a standard wheel lock that does not cover the lug nuts, they can remove the tire and replace it with your own spare! See PurpleLine web site for details:
Nemesis Professional Caravan Wheel Clamp | Trailer Accessories | Purple Line. Used for about two months, then we put camper into locked, secure storage and no longer need this level of security. Our loss, your gain. My original cost: $213.00! Asking $100. No shipping, but can meet within 100 miles of Fort Collins, CO, plus we are headed to Arkansas/Missouri Ozarks October 15. Could meet there on somewhere along our route.