This trailer lock is made from solid steel and painted striking yellow coating, that can provide high visibility with the last anti-theft technology. The Jayloe Trailer Coupling Lock is designed and build with quality and durability and offers universal fitment on all trailers with 50mm diameter hitches. It is easy to install within seconds, just fit the lock into the hitch as the tow ball on your caravan or trailer and lock in place with multi-position adjustments. This means that the caravan or trailer cannot be connected to another vehicle which makes theft much impossible. To unlock, simply use the keys provided and your caravan or trailer is ready to hook up. The heavy-duty steel and quality coating of the lock prevents corrosion and rust in all weather conditions. It is an effective solution with a little investment to protect your expensive caravan or trailer.