The TR-04 JR Junior Camera Case Cart is a fully collapsible cart. It is held together by four round posts which attach to the top and bottom shelf’s special receiver, shelves are secured with a Hand Prong. All accessories are attached to the posts and secured with the use of a 5/32:" Hex Wrench. Top Shelf is adjustable and can be set at any height. Posts come with a built-in collar to help you set height at your preferred location. The wheels are detached by sliding them out of a rail unit secured by a 5/32" hex screw and safety button.