The wall-mount design and solid steel construction of this interoffice mailbox brings convenience, anonymity and security to the workplace. The drop slot opening is located on the top of the mailbox and measures 10 1/2" W x 3/4" D; allowing it to accept letter-size documents, standard envelopes, memos, discs, CD-ROMs and more. The drop box includes a lock and two keys to deter unauthorized access, making it ideal for securely collecting interoffice mail, outgoing mail, reports, payments due and employee feedback. Great for offices, mailrooms, mail centers, retail stores, break areas and other areas where information and mail needs to be collected. Material(s): Steel; Depth: 3"; Height: 12"; Width: 12".