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Protect just about any trailer from theft with this universal coupler lock, which uses a unique "ball" and shackle to fit a variety of coupler sizes and styles. Secures trailer when it is not in tow.

This rugged, rustproof aluminum trailer coupler lock simply yet effectively deters towaway theft of your trailer that has a lunette-style coupler. Fits lunette rings with 2-1/2" or 3" inner diameter. Padlock sold separately.

This rugged, rustproof aluminum trailer coupler lock simply yet effectively deters towaway theft of your gooseneck trailer that has a Bulldog, Stallion, Superior, or T.E.M. coupler. Padlock sold separately.

Fight back against trailer thieves with this rugged, rustproof aluminum trailer coupler lock. Simple yet effective, it deters towaway theft of your trailer that has a Bulldog Collar-Lok coupler. Padlock sold separately.

This rugged, rustproof aluminum trailer coupler lock simply yet effectively deters towaway theft of your trailer that has a lunette-style coupler. Fits lunette rings with 2-1/2" or 3" inner diameter. Includes stainless steel padlock.

Secure your fifth-wheel hitch to its base rails with these plates. Insert the pin that holds your hitch in place through one part of the plate and add a padlock (sold separately) next to it. Prevents removal of the pins and, therefore, the hitch.

Fight back against trailer thieves with this rugged, rustproof aluminum trailer coupler lock. Simple yet effective, it deters towaway theft of your trailer that has a trigger-style, latch-style, or handwheel-style coupler. Padlock sold separately.

Fight back against trailer thieves with this rugged, rustproof aluminum trailer coupler lock. Simple yet effective, it prevents removal of the inner tube of your gooseneck coupler to help deter towaway trailer theft. Padlock sold separately.

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

One-piece security wheel lock and anti-theft device for trailers, cars and ATVs. Fits tires up to 12" wide.

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.