The Ark Trailer Lock is an essential item if you're into boating or caravanning. The lock features dual-locking position options, making it a strong and smart way to secure your trailer. You can use it either free-standing, or attached to your car. Built tough, and with the inclusion of keys and a padlock, it's cheap insurance to keep your boat, trailer, caravan or camper-trailer safe and secure. Not to be used while towing.