Equip your semi to be Ready for the Road Ahead , with the HD Value 12" x 2" 5.2K LH Electric Brake, a key piece that offers safe and reliable stopping power. This replacement brake allows operators to remotely control the brakes on trailers by sending an immediate electronic signal. Engineered with an easy-to-install and adjustable design to rapidly resolve problems within a trailer's parking mechanism. FleetPride is your First Click in Heavy Duty .