TowSmart 7 Blade Trailer Side Connector is designed primarily for use with large trailers such as R and industrial trailers. This connector features three additional functions not found in 4-pole connectors, including electric brakes, an auxiliary power lead, and a backup/reverse function, making it i for enhanced trailer control and safety. The product is a trailer end plug made of durable plastic and is intended to be used with the Model 48485 vehicle end socket. It comes packaged in a box with a quantity of one. Model Number: 48505