The wall-mount design & solid steel construction of this interoffice mailbox brings convenience, anonymity & security to the workplace. The drop slot opening is located on the top of the mailbox & measures 10 W x D; allowing it to accept letter-size documents, standard envelopes, memos, discs, CD-ROMs & more. The drop box includes a lock & two keys to deter unauthorized access, making it ideal for securely collecting interoffice mail, outgoing mail, reports, payments due & employee feedback. Great for offices, mailrooms, mail centers, retail stores, break areas & other areas where information & mail needs to be collected. Material(s): Steel; Depth: 7"; Height: 18"; Width: 18".