A Holland commercial type sliding fifth wheel could carry . The drawbar should not be confused with the fifth wheel coupling. The term is also used to refer to part of a fifth wheel coupling apparatus. To reduce friction, grease is applied to the surface of the fifth wheel. As a tractor the fifth wheel load rating was . The target market for the Wagon Master were people who pulled fifth wheel RV trailers. The two types of couplings are fifth wheel coupling and automatic. Tractor trucks were used to tow semi-trailers up to with on their fifth wheel. M818 Tractor trucks were used to tow semi-trailers up to with on their fifth wheel. The dolly is equipped with a fifth wheel to which the trailer is coupled. On improved roads they could tow up to with on their fifth wheel. Some fifth wheel coupled trailer buses may also be similarly decorated. All had a front winch, the fifth wheel replaced the rear winch. For flat deck and pickup trucks towing trailers there are fifth wheel and gooseneck hitches.