Equip your semi to be Ready for the Road Ahead™, with the PAI Industries 12V 100A SPST Relay Switch, a key component that helps facilitate the transfer of electrical power. With durable materials and an easy to install design, this replacement switch is the ideal solution to transfer power to various applications in a vehicle. Manufactured with top-tier materials to effortlessly pair with internal wires. FleetPride is your First Click in Heavy Duty®.