BEST Post-Mounted Mailbox. Mindful of the growing concern over mailbox vandalism and mail theft, an institute tested the security and durability of four post-mounted mailboxes. To qualify for the test, all mailboxes had to meet minimum United States Postal standards for mail protection under ambient weather conditions. Boxes must also withstand loads up to 200 pounds without cracking or deforming in excess of 1/8 of an inch. The Institute took the candidates to a laboratory equipped to measure the resistance of the mailboxes to forced entry and destruction. The Fort Knox Mailbox was deemed BEST for its lock's ability to withstand forced entry better than any of the others tested. The Fort Knox Mailbox has a tubular lock which defied all attempts to jam a screwdriver into it, thus preventing it from being jimmied open. The lock on another model succumbed to the screwdriver in only nine seconds. In the load machine test, all other mailboxes tested, developed deformations greater than 1/8 of an inch at just over 200 lbs of pressure. The Fort Knox Mailbox endured better than 1,400 pounds of pressure without exhibiting any deformation or cracking whatsoever. Unlike other mailboxes made of aluminum or plastic, this mailbox is made of 1/4 inch steel for outstanding durability and strength.

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