Heavy Duty Large Steel Locking Mailbox

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Orders over $99

Keep Mail Secure with our Heavy Duty 1/4 inch steel, Made in USA, Locking Heavy Duty Mailbox.

Protect your mail from theft and damage with our rugged locking mailboxes, precision crafted in the USA from 1/4” thick steel. What exactly does 1/4 inch steel mean. Technically it is 3 gauge steel and the average residential mailbox is made from very thin 26 gauge steel or possibly even lighter 28 gauge steel. We like to call these big box store mailboxes tin cans because the metal is so thin its much like a soda can. For gauge thickness in steel the smaller the number the thicker the steel. 

To understand this a little more, think of it like this: 1/4” steel (3 gauge) is more than 13 times stronger than 12-gauge. 12 gauge is more than adequate for most mailbox needs and many of ours are made from 14 gauge, so if you buy this locking mailbox made from 3 gauge steel it is 13 time more stronger than most home safes which are made from 12 to 14 gauge steel. 

This high security mailboxes feature generous 12” x 24” x 23” overall dimensions to hold thick envelopes, magazines and small packages. The 11” x 11” x 3” drop opening allows insertion of thicker mail and small boxes up to 3” tall. The maximum package size it will allow is 10" wide by 10" long by 3 inches thick. 

The 2” continuous weld steel hinge and 3/16” reinforced access door keep pry attempts at bay. A commercial grade vault lock with two keys secures the contents from snooping hands. The box can hold mail and packages up to 10 inches wide and deep and 3 inches tall, for maximum capacity. An optional outgoing mail tray and flag can be added using the drop down options below the price. 

Finished with a durable powder coated finish, these mailboxes look as great as they function. Available colors include classic black and gray, or customize the color to match your home or business. Mount your locking mailbox in ground with the optional 5” x 5” x 57” steel post or opt for surface mounted post. This mailbox includes predrilled mounting holes. 

With solid steel construction and precision manufacturing, our locking mailboxes deliver rugged dependability and security for your mail. Order now to protect incoming mail against theft, damage or tampering. Not the size you need, click here for the next size up? This same style comes in 3 additional larger sizes with larger drop openings.  Optional vinyl lettering available. 

Heavy Duty Locking Mailbox Specifications:

  • Dimensions: 12″ x 24″ x 23″
  • Drop opening: 11” x 11” x 3”
  • Max package size: 3″ H x 10″ W x 10″ D
  • 1/4” thick steel (3 gauge steel)
  • 3/16” reinforced steel access door
  • 2” continuous weld steel hinge
  • Front retrieval access w/ optional rear access
  • Vault style lock with 2 keys
  • High quality powder coated finish
  • Color options: Black, gray, custom
  • Brushed nickel pull handle (drop door)
  • Optional vinyl lettering available
  • Post option: in ground 5″ x 5″ x 57″ or Surface mount 
  • Approx weight:  170 LBS.
  • Made in the USA

Locking Security Mailbox offers a 60 day return policy, please see details at: https://lockingsecuritymailbox.com/shipping-returns/


1 Year Manufacturer Warranty