Rolling cart toolbox features telescopic extension handle and two wheels which allow for easy transportation. This built to last portable tool chest is constructed of plastic and durable all-steel latches. Easy to grip side handles make grabbing and moving this unit effortless. The inside plastic tray is great for keeping tools organized. Wheel size 5.9 In. x 1.6 In. Channellock 22 In. toolbox with organizer, Model No. 320304-CL, can be attached to this rolling toolbox.