The MGM Brakes S-Cam Spring Brake Chamber is designed to provide superior braking performance and reliability. This brake chamber is designed with a tamper resistant design, an integral release bolt mechanism, and minimal bolt protrusion of 1.25" protrusion on long stroke models when manually released. The power spring non coil clash design helps to reduce the hold off pressure, providing a smoother and more reliable braking experience. FleetPride is your First Click in Heavy Duty®.