Prepare your semi truck to be Ready for the Road Ahead , with the Power Products 6 - 36V 2-Stud Master Disconnect Switch that delivers enhanced battery safety. Thanks to its ability to cut the power to an entire system, this replacement switch is the ideal option to prevent battery drain through complete isolation. Crafted with durable materials to prevent fires, electrocution, and other hazardous situations. FleetPride is your First Click in Heavy Duty .