The Buyers Products part number TC1007 refers to a 7-Way Die-Cast Metal Trailer Connector, designed for the truck side. This robust connector provides a secure electrical connection between a towing vehicle and a trailer, commonly used for utility trailers, boat trailers, fifth wheel, and gooseneck trailers. It features durable die-cast zinc construction, a built-in safety latch for secure coupling, and a spring-loaded door that protects the round terminal pins when not in use.