Ensure you're Ready for the Road Ahead with reactive trailer brakes, with the Redneck Trailer Supplies 12-1/4" x 3-1/2" LH Electric Brake Assembly. Once equipped, this replacement part effectively actuates a trailer's brake system to bring it to a safe, slow stop in sync with the main vehicle. Crafted with self-adjusting brake shoes to provide maximum performance and long-term reliability. FleetPride is your First Click in Heavy Duty .