Ensure the security and convenience of your trailer connection with the HILILON Trailer Coupler Pin. This pin features a solid steel construction with a diameter of 5/16 inches and a length of 2-3/4 inches, accompanied by trailer pins for added stability. It also includes a plastic coating tether and a quick release ring, providing versatility and ease of use. The pack contains 10 pieces of these pins, each with a length of 11-1/2 inches. The D-shaped clip, made of durable spring steel, offers both strength and flexibility. Its length has been increased to ensure easy handling and improved maneuverability. Operating this trailer hitch pin is simple—just insert the safety pin into the coupler latch, and the D-shaped retaining clip easily attaches to the end of the pin, securely locking it in place. The trailer coupler pin is corrosion-resistant due to its durable zinc-plated finish, providing excellent protection against rust and corrosion. This ensures long-lasting durability and reliable performance, even in challenging weather conditions. With a 5/16-inch (8mm) diameter and 2-3/4-inch (70mm) length, this trailer pin is highly versatile and compatible with a wide range of trailer couplers. It can also be used for various applications, including trailer jack wheels and pintle hooks. Constructed from solid steel, the 5/16-inch (8mm) spring pin offers high strength and reliability, ensuring safe and confident towing throughout your journeys.