The locked box needs a key to open; Includes a set of two keysOur mailbox provides a safe place for your mail, and it is large enough to accommodate all kinds of padded envelopes, documents, newspapers, etc.Made of high-quality aluminum alloy, it is durable and exquisite in appearance.Customers and employees can use this box to make anonymous suggestions or comments on the company or service.The box can be easily installed on the wall with the attached hardware, or it can be simply placed on a table, table or other flat surface.