The TowSmart 7-Blade with Jacketed Cable Trailer End Connector provides what you need to make electrical connections when hauling a trailer. The 7-blade trailer end connector offers a single housing design that plugs into your vehicle's electrical socket and splices into trailer wiring to provide a superior connection. The 7-blade connector is commonly usedon RV trailers or large trailers and connects taillights, brake lights, turn signals, ground, electric brakes, auxiliary power, and reverse lights. It provides an ergonomic, durable plastic construction that is corrosion-resistant to withstand extreme weather.