The SuperLite Single Point Attachment Fifth Wheel Hitch is easy to install. Two positions forward or rearward of the king pin (+/- 3") and adjustable height settings. The 20K adapter enables fifth wheel and gooseneck trailer owners to two either without swapping hitches. Detachable base rails reduce stress on the truck bed to minimize crushing and surface wear. The flexible design allows the fifth wheel kingpin to be positioned forward or rearward of the gooseneck ball. Fits all popular and OE 2-5/16" gooseneck ball brands.