The new AL-KO Premium Security Device 3004 provides a substantial deterrent against the theft of the caravan and the stabiliser. Designed to lock over the coupling handle, and enabling the stabiliser handle to be lowered, the hitch lock can remain on your vehicle even when towing. When not coupled up, insert a safety ball (available separately CTB 3342) within the coupling head before applying the hitch lock to prevent the caravan from being coupled to another vehicle.  See More Info.