General description This durable Mophorn Collar 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 resists 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. Technical specifications Item Model Number: THS004 Style: Clamp-on Main Material: Carbon Steel + Surface Coating Compatible Coupler Type: Cast Air Flow Coupler Compatible Coupler Sizes: 2 in / 50.6 mm; 2-5/16 in / 58.6 mm Product Weight: 11.46 lbs / 5.2 kg Product Dimensions: 5.71 x 4.61 x 8.27 in / 145 x 117 x 210 mm Wall Thickness: 0.2 in / 5 mm Internal Space: 5.16 x 5.24 x 4.09 in / 131 x 133 x 104 mm Usage Simple to operate and equipped with three keys, this hitch lock is compatible with RVs,