Durable Material: This trailer connector bracket is made of high quality metal and nylon. It is flame retardant, high temperature resistant, sturdy, not easy to break, can withstand certain shocks and pressures, weather resistant, durable and has a long service life. Outstanding Protection: This trailer socket mount features a locking nose that securely locks the adapter, providing additional protection to the socket. It is easy to install and only requires an adjustable wrench (not included). The design protects the copper contacts of the plug from damage. Useful Function: The trailer adapter plug retainer screws onto the trailer bar. It provides additional support and retention to ensure the stability of the trailer adapter plug. This design reduces the risk of the plug coming loose and allows you to keep the plug in good condition while towing. Easy to Use: The narrower bottom of the plug holder fits the plug 7-pin electrical plug and the wider upper part of the plug holder fits perfectly with the 13-pin electrical plug, which can also be used as a cover for the tow bar while driving. You can screw the adapter onto the trailer drawbar.