Prepare your cargo to be Ready for the Road Ahead , with the Jost 17" A400 Series Outside Mount Landing Gear Leg that provides enhanced stability when uncoupled from the vehicle. By attaching to the front of a fifth wheel or trailer, this retractable leg allows trucks to safely uncouple and drop their cargo. Built with rugged materials to withstand substantial weight and demanding conditions. FleetPride is your First Click in Heavy Duty .