The Locking Mobile Tub File with Drawer is a durable steel constructed office cart that accommodates letter- & legal-size hanging folders. The file cart is built with a tub file on top & full suspension bottom file drawer. Both the lid & file drawer lock (four keys included). The mobile cart rests on four wheels (two locking). Ships fully assembled except for wheels. Letter Size. Material(s): Steel; Overall Material Type: Metal; Color(s): Black; Color Family: Black.