The TowSmart 7-Blade to 4 or 5-Wire Flat Trailer Light Wiring Adapter is the quickest and easiest way to make electrical connections when hauling a trailer that has a different wiring configuration than the vehicle. The adapter connects taillights, brake lights, turn signals, ground, and reverse lights. The single housing design plugs into your vehicle's electrical socket. It provides an ergonomic, durable plastic construction that is corrosion-resistant to withstand extreme weather.