Trailer hitch lock with 1 or 4 connector lock Function: 1. 2 Lock size: This is a trailer hitch receiver and coupling lock kit, 5 or 8 inch diameter, 3-1 or 2 inch length, hitch receiver pin lock for Class III IV receiver, trailer hitch lock has 1 or 4 inch diameter, 3 or 4 inch span. 2. Anti-theft lock: Designed for long-term pulling and safe protection of trailer, boat, motorhome and other items from theft, the trailer hitch can be installed quickly and easily for easy use. 3. Receiver lock action: The trailer lock adopts a push-to-lock design, which can be easily pushed without a key. To open them, just turn the key slightly and the pin will bounce off itself. 4. Coupler lock support: The connector lock is easy to operate, with screw type lock, which you just need to turn the key 5-7 times to open or lock, saving time and effort. 5. Highest quality materials: made of high strength zinc alloy and coated with electrophoretic paint, the trailer hitch lock is durable and rust-resistant, and the dust cover is designed to protect the keyhole from water and dirt. Specification: Item Type: Trailer Hitch Lock Material: stop zinc Surface treatment: Spray paint Objective: Prevent theft Scope of application: RV, truck, trailer, construction vehicle, motorhome List of packages: 1 x Dumbbell Trailer Lock 1 x small 1 or 4 inch trailer lock 4 x key 1 x pin