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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.

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.

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 deters towaway theft of your trailer that has a Bulldog Collar-Lok coupler. Includes stainless steel padlock.

Get absolute security for your unattended, disconnected trailer with this heavy-duty, aluminum coupler lock. Designed for standard lipped couplers.

Guard your trailer with an A-frame coupler by using the Steal Shield coupler lock. It discourages theft and fully encloses your coupler, protecting it from damage and weather. Fits most A-frame trailer couplers.

Guard against trailer towaway theft with this universal-fit coupler lock. Durable steel frame fits around 1-7/8", 2" and 2-5/16" ball couplers, providing both a visible and mechanical theft deterrent.

Guard your trailer with a Bulldog Collar-Lok coupler by using the Steal Shield coupler lock. It discourages theft and fully encloses your coupler, protecting it from damage and weather. Fits 1-7/8", 2" and 2-5/16" ball sizes.

Guard your trailer with a straight-tongue, trigger-latch-style coupler with the Steal Shield coupler lock. It discourages theft of your trailer and protects your coupler from damage and weather. Fits 1-7/8", 2" and 2-5/16" ball sizes.

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-, latch-, or handwheel-style coupler. Includes stainless steel padlock.