This Hopkins Towing Solutions 7-Blade RV Round to 6-Pole Trailer Wiring Connector New 47555 converter allows you to adapt down from a 7 Blade RV round connector to a 6 Pole trailer side connector without having to rewire the truck or trailer. This adapter also allows you to open it and change the pin locations for auxiliary and electric brakes making it the perfect adapter for either 6 Pole Round wiring code. An included dust cover adds an extra layer of weatherproofing for long lasting performance.