Outfit your semi truck to be Ready for the Road Ahead with seamless trailer coupling, with the Jost JSK37U Series Fifth Wheel Top Plate. With a streamlined design, this replacement plate is able to act as the connection point between a vehicle and trailer, locking the two together while preventing unnecessary movement. Manufactured with a rigid and durable body to resist damage from repetitive connections and heavy duty equipment. FleetPride is your First Click in Heavy Duty .