Curt Manufacturing 57005 Towing Wiring Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs Enables vehicles with a 7-way RV blade socket to recognize LED trailer lights Built-in, integrated resistors for computers that don't recognize LED lights 6-way connects tail, brake, turn signals, electric brakes and auxiliary power Simple plug-and-play design eliminates the need for cutting or splicing