Built Like a Vault—Now with More Room

Think bank-vault security—for your mail and packages. With the Vault XL, you can trust your deliveries are protected

The Vault XL is 12″ taller than the standard Vault, giving you expanded capacity while maintaining the same uncompromising construction: ¼” solid steel, hand-welded seams, incoming mail baffle, recessed doors, and zero pry points.

It’s the extra space you need, backed by the same legendary Fort Knox protection.

Built for Maximum Security

• Size: 12” W × 36” H × 24” D
• Weight: 225 lbs of steel muscle
• Package Capacity: Fits boxes up to 6” tall, 10” wide, 10” deep
• ¼″ thick steel body
• 3/16″ reinforced steel doors
  
• Seamless hand-welded construction (no rivets, no weak points)
• Oversized 2″ continuous welded steel hinge
  
• Upgraded Lock to Vault Lock EXTREME with Medeco® lock + 2 keys
• Brushed satin nickel pull handle
• Weather-proof powder coating inside & out
• Custom Sizes Available: Call 1-800-206-8067
  • OR email us custom@fortknoxmailbox.com

Why Customers Love the Vault Series

• Available in four sizes
• Stores large volumes of mail and packages in one secure compartment
• No need to unlock multiple doors every day
• Perfect for travelers, snowbirds, and long-term storage needs
• Go days or weeks without checking in, worry-free

Need something unique? We also build custom sizes—contact us to get started.

✅ Meets all USPS requirements

How It Works

Simple. Secure. Built Like a Tank.

1. Carrier pulls down the handle and the baffle raises inside.
2. Mail carrier inserts mail and packages into the baffled door area and closes.
3. Mail or small packages drop into the baffle door.
4. As the door closes, items fall into the locked compartment below.
5. Only you have the key—peace of mind every day.

Mounting Made Simple

The Vault XL is ready to install with pre-drilled holes:

• 4 holes, 6 ¾” apart on the bottom
  
• In-Ground Post (5" x 5" x 50”) for XL and XXL Vaults
• Surface Mount Posts (5" x 5" x 18")
  • Available for sidewalks, driveways, or other hard surfaces
• Can also be set into masonry for a permanent, built-in look

Style & Options

• Standard colors: Slate Gray or Glossy Black
• Upgrade: any custom solid powder coat color (See color chart HERE)
• Free 1¾″ adhesive address numbers included
• 3" Side numbers available
  

Extra Upgrades Available

• Outgoing Mail Slot + Flag (1¼″ slot added inside)
• Rear Door Access (front + rear doors keyed alike or welded/sealed front)
• Mounting Choices: In-ground, or surface-mount (breakaway) post options
• Aluminum Mail Tray
• Motion Activated LED Light

In short: The Vault XL is designed for bigger deliveries and maximum peace of mind. With 225 pounds of solid steel and a lock system trusted by security pros, it’s not just a mailbox—it’s a stronghold on your curb.