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.