Features： 1、Heavy Duty: Made of stainless steel, brass, and quenched steel, trailer hitch lock can withstand physical attacks, erosion, and harsh weather conditions, and resist wire breakage pliers, adding extra protection to your trailer. 2、Adjustable Design: The gooseneck lock body with adjustable two pin positioning system, which enables easy customization to make a perfect fit with different trailer. 3、Wide Application: Suitable for RVs, livestock carriers, and heavy duty trailers, this gooseneck trailer hitch lock fits all gooseneck 2 5/16 style couplers, ensuring compatibility with various trailer types. 4、Professional Grade: Carefully designed by a professional team and upgraded with high grade aluminum materials, this gooseneck lock is strong, and wear resistant, providing ultimate security for your trailer. 5、Size: The overall size of trailer hitch lock is 11 inch in length, 6?1/4 inch in width, and 4?1/2 inch in height. Along with a pin diameter of 3/4 inch. Specification： Item Type: Gooseneck?Trailer?Lock Material: Metal Overall Size: 11in x 6-1/4in x 4-1/2in (long x wide x high ) Pin Diameter: 3/4 inch Fitment: Compatible with all Gooseneck 2 5/16 inch Couplers Suitable for Trailers, RVs, and Camper Trailers Package List： 1 x Gooseneck?Trailer?Lock?? 1 x Locking Pin 1 x?Combination?Lock