The Vault XXL : Extra Extra Large 1/4 Inch Steel High Security Parcel Locker

Fort Knox Vault XXL large locking package mailbox
Fort Knox Vault XXL large locking package mailbox Fort Knox Vault XXL installed package mailbox Fort Knox Vault XXL open showing package compartment Fort Knox Vault XXL heavy-duty steel construction Fort Knox Vault XXL package delivery capacity Fort Knox Vault XXL black locking package mailbox Fort Knox Vault XXL white locking package mailbox Fort Knox Vault XXL dimensions and cutaway view Fort Knox combination key lock
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The Vault XXL — Built Like a Vault — Even More Room
18" W x 36" H x 24" D @ 325 LBS.

Think safehouse security—for your mail and packages. The Vault XXL combines extra storage space with the heavy steel construction Fort Knox is known for.

The Vault XXL is 6" wider than the Vault XL, giving you a wider package opening and more storage room for incoming deliveries. It features a ¼" solid-steel body, hand-welded seams, an incoming-mail baffle, and reinforced recessed doors designed to limit exposed pry points.

Even more room for mail and packages, backed by the same Fort Knox protection.

Built to exceed USPS delivery requirements

What Makes It Different

The Vault XXL gives you more width for packages and more room for stored deliveries. Its baffled delivery door allows incoming mail and packages to drop into the locked compartment below, helping protect stored deliveries from reach-in attempts.

The Vault Lock EXTREME with a Medeco® lock and 2 keys is included. Combined with the steel body and reinforced doors, it provides substantial protection for the deliveries you leave inside.

Room for wider packages: The Vault XXL accepts individual packages up to 6" H x 16" W x 10" D. Its wider body provides additional space below the delivery door for accumulated mail and packages.

Why Customers Love the Vault Series

  • Available in four sizes
  • Stores mail and packages together in one secure compartment
  • No need to unlock multiple doors to collect your deliveries
  • Extra storage for travelers, snowbirds, and households that receive frequent deliveries
  • More room between collections, depending on the size and volume of your deliveries

Need something unique? We also build custom sizes. Call 1-800-206-8067 or email custom@fortknoxmailbox.com to get started.

How It Works

Simple. Secure. Built Like a Tank.

  1. The carrier pulls down the handle, raising the baffle inside.
  2. Mail and packages are placed into the baffled delivery area.
  3. As the door closes, deliveries fall into the locked compartment below.
  4. You unlock the retrieval door to collect your mail and packages.

Need outgoing mail? Add the optional outgoing-mail slot and ¼"-thick flag. Outgoing envelopes are stored separately in a 1½"-tall section in the upper portion of the mailbox for carrier pickup.

Key Specifications

  • Size: 18" W x 36" H x 24" D
  • Weight: 325 lbs.
  • Steel body: ¼" solid steel
  • Reinforced doors: 3/16" steel
  • Maximum package dimensions: 6" H x 16" W x 10" D
  • Hinge: Oversized 2" continuous welded steel hinge
  • Included lock: Vault Lock EXTREME with Medeco® lock and 2 keys
  • Custom sizes available: Call 1-800-206-8067 or email custom@fortknoxmailbox.com

Mounting Options

The Vault XXL comes with 4 pre-drilled bottom mounting holes spaced 6 ¾" apart.

  • In-Ground Post: 5" x 5" x 50", sized for the XL and XXL Vaults
  • Surface Mount Post: 5" x 5" x 18", for sidewalks, driveways, and other suitable hard surfaces
  • Masonry installation: Can be set into masonry for a permanent, built-in appearance

Why the Vault XXL Stands Apart

  • 325 lbs. of steel construction for substantial theft deterrence
  • ¼" solid-steel body with 3/16" reinforced recessed doors
  • Hand-welded seams and rivet-free construction
  • 2" continuous welded steel hinge
  • Incoming-mail baffle separates the delivery opening from stored mail and packages
  • Vault Lock EXTREME with Medeco® lock, included with 2 keys
  • Brushed satin nickel pull handle
  • Powder coating inside and out for weather resistance

Style & Upgrades

  • Standard colors: Slate Gray or Glossy Black
  • Custom solid powder-coat colors available as an upgrade—see the color chart
  • Free 1¾" adhesive address numbers included for the front door

Available Upgrades

  • Outgoing-mail slot and ¼"-thick flag, with a 1½"-tall interior outgoing-mail section
  • Rear-door access: Front and rear doors keyed alike, or rear access with a welded/sealed front retrieval opening
  • Combination lock option with the Vault Lock
  • 3" side address numbers
  • Motion-activated LED light
  • In-ground or surface-mount post options

Shipping and Lead Time

All Fort Knox Mailboxes are built in the USA and ship directly from our facility in Grants Pass, Oregon. Each unit is securely packaged for transit. We ship to the lower 48 states.

Production Time

  • In stock: Ships the same or next business day
  • Not in stock: Up to 21 business days
  • Multiple units: Contact us for current lead times

Freight Delivery

  • Freight only: 1–10 business days in transit, depending on location
  • Fully insured: Freight shipments are covered against shipping damage
  • Palletized packaging: Each unit is secured to a pallet for protection
  • Appointment delivery: The carrier schedules a delivery window when requested
  • Liftgate available: Add liftgate service for residential deliveries or locations without a loading dock

Tracking
Tracking information is automatically emailed as soon as your order leaves our facility in Oregon.

Need it sooner?
Rush builds are sometimes available, depending on the production schedule. Contact us before ordering to confirm the fastest ship date and current stock status.

  • 5 stars: 6 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
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Roger S.

Just wanted to let you know the mailbox and post arrived in good shape last week. That thing is an absolute beast! Just what I wanted. I haven’t had time to install it yet, too many priorities with movers and utilities at the new house. Thanks so much for a truly superior product.

Roger S.

Lake Elizabeth, CA

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Bill B.

Thank you for my awesome mailbox. The candy gold was a nice touch. Now if only the rest of my neighborhood was smart enough. Oh well, we can't save everyone...

Bill B.

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Jose R.

To Fort Knox

First of all, let me start by saying that you guys have the best mailboxes I have ever seen. I am so happy that I found you guys on the internet... Unfortunately I have to wait till April to install your bad boy in my
home in CT....

Jose R.

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Raymond N.

The home I moved into 10 years ago came with a Fort Knox Mailbox. I was very impressed. So, when I recentlymoved into my new residence, one of the first things i did was to order a new Fort Knox Mailbox. These are by far stronger and more secure and built with 1/4” steel making them more secure than any other mailbox on the market. Great product, excellent customer service and the peace of mind that my mail is safe and secure. I love my new Fort Knox Mailbox!

Rick S.

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Raymond N.

We bought a mailbox from Fort Knox Mailbox 5 years ago when we bought property, and we bought another one two years later when we moved my grandparents onto our land. Both mailboxes have held up beautifully, and we have not had any issues. It’s nice to know that our mail is safe, even when I forget to check it for a few days.
The customer service is amazing. You know a company cares when the owners themselves will call to work out details with an order. I cannot recommend this company enough!

Joy C.

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Raymond N.

These are GREAT mailboxes. They are built like tanks and will clearly last for decades or maybe even centuries. They are also smartly designed in terms of where the incoming and outgoing mail goes, and the keyed access door, and how the mail is protected from the elements. If you're sick of cheaply made tin-can mailboxes, get one of these.

Jason R.