I bought my Bulldog Heavy Duty Hitch Lock AA after a detailed trawl through all the other hitch lock devices I could find. I am a belt and braces man and the Bulldog was way ahead in terms of design and construction. It is built like a brick s... house! I also bought the Bulldog wheel clamp for the same reasons.

Both are easy to use after a couple of tries. They are specifically made to fit the road trailer for my boat so I am confident they will deter would-be thieves. They also are easy to stow in the car boot.