Advantage Plus! Hydraulic Detachable Gooseneck (HDG) trailer features a new “arched” design of the gooseneck, providing ample truck-frame clearance. It also offers a five-position gooseneck door adjustment that allows for an 8-inch range of king-pin-height settings. New heavy-duty pullout front outriggers are built right into the frame and provide extra strength at the pivot point. Spring-loaded, stainless-steel latches can be turned and locked open.