Get your semi Ready for the Road Ahead with safe and reliable stopping power, with the HD Value 10" x 2-1/4" 3.5K LH Electric Brake. With a specialized design, this replacement brake allows operators to remotely control the brakes on trailers by sending an immediate electronic signal. Manufactured 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 .