A CURT connector provides a reliable connection for your trailer wiring, using an industry-standard format, such as a 4-way flat, 6-way round or 7-way RV blade. They can be used to install new wiring on a vehicle or trailer or as replacement connectors for existing wiring. This particular connector is a heavy-duty 7-way RV blade plug and is designed to mount on the trailer-side of the connection, to plug into a vehicle socket. Once plugged in, it provides a connection for the taillights, turn signals, brake lights, backup or reverse lights, electric trailer brakes and a 12-volt battery. It also provides a connection for the ground wire. This trailer wiring connector is especially built to withstand the elements. It is constructed from durable black molded plastic to be impervious to rust, and it features an ergonomic grip for easier handling.