This 7-way round connector is designed to supply power for tail lights, turn signals, electric trailer brakes, auxiliary power, reverse lights and brake lights, as well as a ground connection. It features durable die-cast metal construction and is a male-end plug, specifically designed for the trailer side of the connection. It also features a spring attachment to keep wires well protected. 7-way round connectors are commonly used on RV travel trailers, and this particular connector can be easily interchanged with other 7-way RV connectors. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. | Curt 7-Way Round Railer Side Connector Plug With Spring