Mobile Tub File features a locking, hinged lid that slides behind the unit when you access files. Includes two keyed alike keys. Top viewing design allows easy filing and retrieval of stored documents. Holds letter-size hanging file folders (sold separately). Weight capacity is 300 lb. Store binders and more on convenient lower storage shelf. Rolls easily to point of use on four 2" swivel casters (two locking). Made of sturdy steel with a mar-resistant, powder-coat finish.