The Couple-Mate Premium Dual Trailer Safety Lock secures your trailer when it is not in use. But wait, there's more, the Dual Trailer Lock also secures your trailer to your tow ball like a clamp making it near impossible to steal your trailer off your car.
This trailer lock clamps the entire trailer coupling making it impossible to remove the nut under the tow bar. (see detailed info and photo) Great for trailers , boats and even Jet Ski's that are left at the boat ramp.
Approved by all Insurance Companies.