This very secure locking mailbox is made from the best materials including 14 gauge solid steel and a powder-coat finished. The door hinge and hardware are Stainless Steel.  

This unit includes a 4" Diameter 47" long round 14 ga. steel post, designed to be dug into the ground (usually secured with concrete).  The mailbox secures to its post (included) with a special secure locking collar.  No screws, bolts or seams are visible, making it almost impossible for even skilled professional criminals to penetrate the Secure Mail VaultT.   New, more robust keyless entry (keypad) means no keys to carry and easy entry.  Dual-door system for maximum protection - outer door closes solidly with a rare-earth magnet.  Outgoing mail is placed in the outgoing mail clip inside the outer door, ready for the letter carrier to pick up.  Accepts parcels up to 1¾" thick through 10½" x 2¾" incoming mail slot.  Includes red slide flag. Available black or white only. Free house numbers in black, white, gold or silver provided at no additional charge.

Dimensions:
Overall:  12 3/8" wide x 18" high x 21" deep
Outer Door: 10¾" x 7 5/8"
Keypad: 4¼" x 3 7/8"
Mail compartment:  10¾" x 8¼" x 18"
Incoming Mail Slot: 10½" x 2¾"