Can be screwed to the tow bar: You can screw the trailer socket cover bracket to the tow bar, really practical and useful trailer accessories, a good choice for you. Available for 7-13 pin socket: Screw this trailer socket bracket onto the trailer, after parking the trailer, plug in the 13 pin socket, 13 to 7 pin adapter or 7 to 13 pin hook adapter plugs into the socket. Premium material: Made of high quality metal and ABS plastic, this trailer socket bracket is flame retardant, high temperature resistant, sturdy, not easy to break. Good quality not only provides a safer guarantee, but also good materials can increase the product's lifespan. Protection: Trailer socket bracket with locking nose, firmly locks the adapter, easy to install, all you need is a key (not included), use this socket bracket to protect the copper contacts of the socket from damage. Feature: The trailer adapter protection bracket can be used on bike racks, RVs or horse trailers, and it is waterproof and can also prevent dust from entering.