Keep your mail safe, protect your identity with the Mail Safe Lockable Post Mount Mailbox. This USPS approved curbside locking post mount mailbox is constructed from steel and high impact polymer for extra security. A concealed locking access door keeps correspondence from being lost or stolen and accommodates incoming and outgoing mail. The extra wide mail slot exceeds postal regulations and accommodates a variety of mail. It fits most mailbox posts, including the Arlington Premium Aluminum Post. The post is sold separately.