Office Dimensions know the importance of files - and the ability to move them. The Files Cabinet Dolly for vertical files offers a quick and easy solution for making your stationary file cabinet into a mobile file cabinet. This adjustable File Caddy can be use for files cabinets that are 14.25", 15", 17.25", and 18" wide. It an also adjust for the depth. The file caddy can accomodate 18", 22", 25", and 26.5" deep file cabinets. The File Cabinet Dolly assembles without tools and features 4 heavy-duty wheels.