The File Cabinet Dolly is an easy solution when you need to make a lateral file or storage cabinet mobile. The product can be adjusted to accommodate 30", 36" or 42" wide cabinets. It also adjusts for units that are 18", 18.63", 19.25" or 24" deep. Each cabinet dolly features four swivel casters, or wheels. Two of the wheels feature locking mechanisms to keep your cabinet in place.