The Couplemate® Caravan Reversing Guide (Marriage Saver®) makes hitching up your caravan/boat or camper easier than ever! It takes just MINUTES and prevents those awkward ‘oh no’ moments Lock the trailer hitch when travelling to help prevent accidental uncoupling. Moving over rough ground has been known to cause your trailer coupling to become dislodged from the tow ball. The Couplemate Trailer guide, when used vertically, helps stop decoupling.