Update your semi truck with a reliable power transfer to its lighting systems, with the Grote 10'-9" Two Slim-Line Male to Double Female Jumper that ensures you're Ready for the Road Ahead. By acting as a bridge between an internal power source and an external light, this replacement wire is able to transmit currents when a vehicle is switched on or off. Built with a streamlined design for a quick installation into connectors and lights. FleetPride is your First Click in Heavy Duty.