Fort Knox Large Standard Slam Lock

The Large Standard — Ready for Serious Mail Security
12" x 12" x 23" @ 96 LBS. WITH SLAM LOCK

The Large Standard is built for high-volume protection.

With ¼” thick steel walls, reinforced 3/16” recessed doors, and a streamlined, pry-resistant design, this 96-pound tank of a mailbox holds about 2 weeks of mail —perfect for short trips or busy weeks.

It’s the same construction as The Enforcer Mailbox just scaled up 2 inches in every direction.

Built for People Who’ve Had Enough

If your last locking mailbox failed, you’re not alone. We hear from frustrated customers every day.

The Large Standard was made for exactly that reason: to be the final answer. Tested against theft attempts coast to coast, it’s built to withstand it all.

If you’re done taking chances, this is the last mailbox you’ll ever need.

✅ USPS Postmaster General approved

How It Works

1. The mail carrier inserts incoming mail into the slot at the top (11.5” W x 1.75” H).
2. Mail drops into the locked compartment—accessible only with your key.
3. Optional "Add a Flag" and outgoing mail rests below the incoming slot. 
   • Holds 1–4 envelopes (must stick out for carrier pickup).
   • No concealment door like some of our other larger models.
     

Additional details:

• Pre-drilled on the bottom (4 holes, 6 ¾” apart) to fit Large Posts, or mountable to existing surfaces.
• Finished with thick powder-coating for weather resistance.