Review on Zone Tech Security Wheel Clamp Chock Lock: Heavy-Duty Anti-Theft Tire Claw for Car, Trailer, Truck, and SUV by Robert Ryokan

This is a very thin metal, someone with a battery powered grinder can work through it in 2 minutes. But it's a great visual deterrent to theft. Each comes with two keys. When I received it one of the keys was damaged and could not be used, so I don't have a spare key for any of them.