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Heavy-duty collar locks around your fifth-wheel trailer's king pin, ensuring that it cannot be attached to anyone else's hitch.

Fight back against trailer thieves with this rugged, rustproof aluminum king pin lock. Simple yet effective, it deters towaway theft of your fifth-wheel trailer. Padlock sold separately.

Enjoy ultimate security for any of your towing needs. This universal, heavy-duty lock fits gooseneck couplers, lunette eyes and fifth wheel king pins (with included adapter).

Steel sleeve fits over your fifth-wheel trailer's king pin and locks in place with the included padlock to deter towaway theft.

Easy-to-use collar locks around your trailer's king pin so that it cannot be hooked up to anyone else's hitch. Bright red color provides visible theft deterrent, and the chrome-plated, deadbolt-style lock can double as a receiver lock.

This fifth-wheel king-pin lock from Andersen Manufacturing prevents theft of your trailer when it is not being towed by locking into place around the king pin and deterring anyone from driving away with your trailer.

Fight back against trailer thieves with this rugged, rustproof aluminum king pin lock. Simple yet effective, it deters towaway theft of your fifth-wheel trailer. Includes stainless steel padlock.