Product Details: Prepare your semi to be Ready for the Road Ahead™, with the OTR 15.5" x 2" 7-Spring Advantage Self-Adjust Clutch that provides a seamless transition of gears. Thanks to its specialized design, this replacement clutch is able to engage / disengage the engine from the transmission, permitting the safe change of gears. Crafted with top-tier materials to transmit maximum power, reduce drag, and deliver a smooth engagement. FleetPride is your First Click in Heavy Duty®.