Sturdy and material: our trailer coupler padlock is made of zinc alloy, the of the lock have a black coating to prevent , the part of the lock is stainless steel and not rust, it is very strong, a very practical tool that can be applied for a long time Easy to operate: this padlock-style trailer tongue lock is easy to install and simple to remove, and uses a simple 1/4 turn lock activation for convenient locking and unlocking as needed Portable size: 1/4 Inch diameter tongue lock pin with effective length 3/4 Inch, small size for easy carrying, 't take much space, keeping the coupler lock in your pocket or vehicle anywhere that is fine; Note: please verify dimension and length of the pin you want before purchasing our coupler hitch lock pin Instructions: each one of our lock is combined with 2 keys, in case of losing, you just need to insert the key and turn the key 5 - 7 times to open, and align the pin to the key hole, turn the key 5 - 7 times to lock Widely application: provides additional security for your , boat or trailer by securing the coupler on your trailer tongue, also secures trailer door latches, cargo boxes and other types of doors Easy to stock: Small size for easy stock, in your pocket or vehicle anywhere that is OK. Two keys: For your convenience, two keys are included with this trailer tongue lock, you can keep the spare key in a discrete location for emergencies or give it to a friend for helpful. Note: The style of the key is random and cannot be Material:Aluminum alloy colour:Black<br><br>Package Contents: 2 x Trailer lock 4 x Key Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.