The Mail Boss Metro High Security Locking Wall Mount Mailbox in Black (Model 7162) is a large, steel mailbox with one compartment that offers excellent security with its locking feature. It is designed for both commercial and residential applications, with a modern style and power-coated finish that makes it both functional and stylish. The mailbox includes 3 keys for locking and unlocking, and it is weather-resistant to withstand various elements. With an incoming mail slot and a depth of 4.5 inches, this mailbox is an ideal choice for protecting your mail and ensuring its safety.