A 7 Blade connector is typically used with large trailers (RV and industrial) and is the most popular tow package connector on new tow vehicles. This connector provides the following functions: left/right turn, taillight, ground, auxiliary, electric brake and reverse. Product Features:Made With Aluminum HousingCorrosion Resistant TerminalsMeets SAE StandardsRear Grommet/ Strain Reliefs For WeatherproofingUsed On Large Utility TrailersIncludes Step-By-Step Procedures And Diagrams100 Percent Tested