Equip your cargo to be Ready for the Road Ahead , with the Jost 17" A450 Magnum Series Inside Mount Landing Gear Leg, a key component to keep your cargo stable when uncoupled. To allow trucks to safely uncouple and drop their cargo, this retractable leg attaches to the front of a fifth wheel or trailer. Fashioned with resilient materials and precision engineering to withstand substantial weight and rough conditions. FleetPride is your First Click in Heavy Duty .