With this Hopkins Towing Solutions 7 Blade to 4 Flat Adapter you are able to quickly convert your 7 blade vehicle side connector to a 4 flat trailer end connector. This easy grip adapter has a patented weatherproof design and includes a dust cover for the 4 Flat to help prevent corrosion. Our unique new Plug-In Simple design eliminates the need for rewiring. The perfect solution to simplify your towing experience.