Tow Bar Assembly The WFI-TBA (Tow Bar Assembly) slides into the forklift tubes of any four way forkliftable container and is locked into place by two slide pins. It can be used for towing a Collapsible Container behind a Hummer, All Terrain Vehicle, or any vehicle with towing capabilities. The front of the tow bar is equipped with a 2.5" I.D. steel pintle eye for connecting to a standard pintle hitch. The WFI-PHA (Pintle Hitch Assembly) is inserted into the rear of one container to daisy chain it to another container allowing both to be moved in tandem.