Features 1、Safe Protection: Locking receiver hitch pin comes with a rubber cover to prevent water and dust penetration, which is weather resistant and tough. 2、Application: Trailer hitch locking pin is used for anti theft, and widely suitable for RV, truck, camper, engineering vehicle. 3、Easy Using: 5/8in diameter and 9/16in diameter locking pin, easy to lock after opening, sensitive response and flexibe operation. 4、Low Noise: This kit includes 3pcs 2in rubber muffler pads that provides additional damping between your hitch and receiver, and can effectively reduce noise. 5、Features: Locking receiver pin is made of durable and hard steel with black coated surface, which is rust proof and not easy to broken. Specification Item Type: Trailer Hitch Locking Pin Material: Steel and zinc alloy and rubber Surface Treatment: Paint Product Function: Prevent theft Application: Suitable for RV Truck Trailer RV Engineering Vehicle Camper Package List 2 x Trailer Hitch Locking Pins 1 x Pin 2 x Keys 3 x Muffler Pads