General description This heavy-duty trailer lock is a reliable anti-theft solution designed specifically for 2-5/16 inch airstream couplers, providing robust protection for RVs, trailers, and boats. Constructed from sturdy carbon steel, it is resistant to tampering with tools such as crowbars and drills. The powder-coated finish and aluminum alloy body ensure long-lasting durability and corrosion resistance. Technical specifications Item Model Number: THS007 Main Material: Carbon Steel + Surface Coating Compatible Coupler Type: Flanged Air Flow Coupler Compatible Coupler Size: 2-5/16 in / 58.6 mm Product Weight: 10.36 lbs / 4.7 kg Product Dimensions: Φ5.59 x 6.89 in / Φ142 x 175 mm Wall Thickness: 0.24 in / 6 mm Internal Depth: 4.92 in / 125 mm Internal Diameter: 5.04 in / 128 mm Installation Simple to install: Just slide it into place and lock it effortlessly with one hand. Secures your trailer in under 30 seconds. Usage Compatible with RVs, trailers, boats, and other vehicles.