Durable Steel Trailer Coupler Lock: Reliable Security Against Theft This robust trailer coupler lock is designed to provide reliable security for RVs, trailers, and boats, accommodating 2-inch and 2-5/16-inch Demco cast head couplers. Constructed from sturdy carbon steel, it is resistant to tampering tools such as crowbars and drills. The powder-coated finish and aluminum alloy lock body help prevent corrosion, ensuring long-lasting durability. Installation is straightforward, and the lock includes three keys for convenient access. Compatible with Two Different Coupler Sizes Durable and Secure Anti-Theft Construction Effortless and Convenient Locking Built to Last and Resistant to Corrosion Secure and dependable solution for safeguarding your belongings. Key Features Compatible with Two Coupler Sizes: Designed to fit 2-inch (50.6 mm) and 2-5/16-inch (58.6 mm) Demco cast head couplers, this lock provides reliable protection for your trailer or RV. Please verify your coupler size before