Product Details: Prepare your semi truck to be Ready for the Road Ahead™, with the Sealco 3/8" Lift Axle Control Line Lock Out Valve that prevents the accidental release of the air brakes. This replacement works to isolate brake components, ensuring they stay locked in place rather than activating while operating. Manufactured with a push / pull design for easy operation. FleetPride is your First Click in Heavy Duty®.