Features 1. Two Lock Sizes: This trailer hitch receiver and coupler lock kit includes a 5/8 inch diameter by 3-1/2 inch long hitch receiver pin lock for Class III and IV receivers, and a 1/4 inch diameter by 3/4 inch span trailer coupler lock. 2. Anti-Theft Protection: Designed for long-term hauling, this lock kit helps protect your trailer, boat, camper, and other equipment from theft. The hitch lock installs quickly and easily for convenient use. 3. Receiver Lock Operation: The trailer hitch lock features a push-to-lock mechanism that secures without requiring a key. To unlock, simply turn the key slightly and the pin automatically releases. 4. Coupler Lock Operation: The coupler lock uses a screw-type mechanism that requires 5 to 7 turns of the key to lock or unlock, providing reliable security with minimal effort. 5. Premium Construction: Made from high-strength zinc alloy and coated with electrophoretic paint, the hitch lock is durable and rust resistant. A dust cover helps protect the keyhole from water and dirt. Specifications Item Type: Trailer Hitch Lock Material: Zinc Alloy Surface Treatment: Spray Paint Purpose: Theft Prevention Application: RV, Truck, Trailer, Construction Vehicle, Camper Package List 1 x Dumbbell Type Trailer Lock 1 x 1/4 Inch Small Trailer Lock 4 x Key 1 x Pin