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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.

Combo pack offers theft protection for your trailer with the butterfly-style coupler lock and secures a ball mount or hitch accessory with the receiver lock. Chrome-plated steel resists rust. Ball-bearing locking mechanisms provide extra security.

Keep thieves from stealing your trailer with this easy-to-use, tube-style trailer coupler lock. The lock goes through your trigger-style latch to protect your trailer when it's hooked up and when it's not.

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.

Use this sturdy, rustproof aluminum coupler lock to help prevent trailer towaway theft. Fits trigger-style, 2" and 2-5/16" ball couplers with either flat or rolled lips.

Whether your trailer is being towed or being stowed, this rugged lock combo deters trailer theft. Heavy-duty steel coupler lock fully surrounds coupler when trailer is unhitched. Keyed-alike latch lock secures coupler to tow vehicle during transit.

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.