Not very theft proof. Slight hit with a mini sledge and can have this off in 5 minutes. Many others out there that are better quality. Vey light weight and hard to fit on each hitch.

My husband and I had one of these and lost the keys to it. We then realized how easy it was to break this off. I would recommend looking at a different trailer lock

This tow hitch lock is great. It's great for when I have to leave my trailers at a parking lot. I have peace of minding knowing that this will help keep my trailers secured and safe. It's also very sturdy.