Description Anti-Theft Trailer Lock Device with Secure Lock Border for Enhanced Security Optimal protection: secure your trailer, caravan or semi-trailer against theft, simply and quickly, thanks to this massive trailer lock. Universal: Suitable for all common towbars with an inlet of 50 mm, the ball head is coupled and the towbar is then securely locked by the steel bracket. Solid construction: the lock is made of solid steel and thus offers optimal protection against theft. High quality cross lock: The high security cross lock only opens with the 2 keys, quick and easy installation. Use for trailers and caravans: The towbar lock is suitable for trailers, caravans or trailers fitted with a 50mm tow ball.It is mounted directly on the trailer.