Feature: 1. Exceptional Durability: Manufactured from robust combination of zinc alloy, aluminum, and steel, this trailer lock endures corrosion, oxidation, and wear, ensuring long lasting reliability and protection on your journeys. 2. Versatile Protection: Enhance security for various trailers, livestock haulers, and RVs, safeguarding against theft and unauthorized movement, providing peace of mind and safety on the road. 3. Convenient Security: Effortlessly secure your trailer with the user friendly combination lock, eliminating the hassle of lost keys and offering enhanced protection with its high security combination code. 4. Heavy Duty Construction: Boasting a robust build with a 3/4in diameter steel pin and weight of 7 lbs, this lock is built to withstand the rigors of heavy duty use, ensuring reliability and durability. 5. Simple Installation and Use: With its straightforward installation process, simply position the lock around the coupler base, secure it with the included padlock, and enjoy the added security and peace of mind on your travels. Specification: Item Type: Trailer Hitch Lock Dimensions: Approx. 28 x 16 x 11.4cm / 11 x 6-1/4 x 4-1/2in (Length x Width x Height) Pin Diameter: Approx. 1.9cm / 3/4in Weight: 3.2kg / 7 lbs Installation: Simply position the lock around the base of your coupler, with the narrow end of the lock fitted over the coupler bracket near the handle. Then insert the 3/4in diameter steel pin through the holes in the lock and secure the pin in place with the included padlock Application: Place the lock around the base of the coupler and secure it with a padlock (not included). Fitment: Fits for Heavy Trailers, Livestock Haulers and RVs. Package List: 1 x Gooseneck Lock 1 x Cotter Pin 1 x Padlock 2 x Key