The TowSmart 7-Blade Trailer Light Wiring Connector is the quickest and easiest way to make electrical connections between your vehicle and trailer when towing. The 7-blade connector (vehicle end) is commonly used on RV trailers and connects taillights, brake lights, turn signals, ground, electric brakes, auxiliary power, and reverse lights. The single housing design mounts to your vehicle to provide a superior connection. It provides an ergonomic, durable plastic construction that is corrosion-resistant to withstand extreme weather.