Attaches to the underside of dolly to facilitate transport of dolly carts in tandem. Must be factory assembled and ordered with desired dolly frame. C-Plate casters must be used with the TBA48 Tow Bar Assembly. For use with 24" wide units only. Number of carts to be towed, weight on carts, and towing route affect operation of tow bar assembly. Before ordering, contact your Metro representative. Tow Bar Assembly not appropriate for use with Brake Lock/Swivel Lock system.