Trailer coupler lock helps deter theft by securing a 2-5/16 in (58.6 mm) flanged air flow coupler with a heavy-duty, close-fitting steel shell. Built for RV, boat, and trailer parking, it shields the coupler from prying and tampering while staying easy to use. Powder-coated carbon steel resists corrosion, and the included keys make lockup and access straightforward.

When your trailer is left in a driveway, storage lot, campground, or marina, the coupler is a common target. This anti-theft trailer tongue lock covers the coupler to reduce access to latch and hardware, adding a visible layer of protection without slowing you down at hookup time. Designed for wide use across trailers, RVs, and boats, it’s a practical upgrade for frequent travelers and long-term parking alike. Grab yours today and lock up with confidence.