Hayman Reese's famous Hitch Receiver Towbar has a 50mm by 50mm hitch box and is the heavy duty towing option. The Hitch Receivers Towbars are often rated to the vehicles maximum towing capacity and are a must if towing caravans, large trailer, boats or horse size floats. This model towbar has a special sized hitch section which means that it is compatible with all Hayman Reese accessories such as Hayman Reese weight distribution systems. The Hitch Receiver Towbar also has a removable Trailer Ball Mount (TBM).