Good visual deterrent but unlikely to stop a determined thief. Wheel locks on the Club are a must or thieves could just remove the tire and even then I wouldn't rely solely on the Club 491 and lug locks to secure your trailer. Let's be honest, if the thief really wants your caravan, he will get it one way or another. There are ways to bypass almost any security device you can buy, but having some is definitely better than nothing. The Club 491, along with some jamming noses, is a good…