Skip to content
YouTube Subscribe & get 5% off – code: YOUTUBE5
YouTube Subscribe & get 5% off – code: YOUTUBE5
Large Locking Mailbox for Outside 21" x 11.2" x 10.5" – Heavy Duty Galvanized Steel Security Mailbox with Key Lock, Weatherproof Anti-Theft Outdoor Mail Box, Large Capacity Modern Mailbox 75870
SKU 75870

Large Locking Mailbox for Outside 21" x 11.2" x 10.5" – Heavy Duty Galvanized Steel Security Mailbox with Key Lock, Weatherproof Anti-Theft Outdoor Mail Box, Large Capacity Modern Mailbox 75870

$92.99 - $92.99
$92.99
$92.99 - $92.99
$92.99
B2B Bulk Pricing Available. Request a quote or call 1-800-761-2955
Security & Privacy
  • 100% Secure payment
  • Secure privacy
FREE Returns
  • 30-day Free Returns
  • Refund for lost packages / damaged items

Protect your mail and upgrade your home’s exterior with this large locking outdoor mailbox measuring 21" x 11.2" x 10.5". Built from heavy-duty galvanized steel, this mailbox offers long-lasting durability and resistance against rust, corrosion, and harsh weather conditions.

The secure locking system helps protect letters, checks, and small packages from theft while keeping your mail safe until retrieval. Its reinforced anti-pry design and reliable key lock provide additional security for residential or commercial use.

The spacious interior allows the mailbox to hold several days of deliveries, including envelopes, magazines, and small parcels. The wide mail slot allows postal carriers to deposit mail easily while maintaining the mailbox’s secure structure.

Finished with a weather-resistant powder coating, this mailbox is designed to perform reliably outdoors while maintaining its sleek and modern appearance. It is suitable for houses, apartments, offices, and businesses looking for a durable and secure mailbox solution.

Combining security, durability, and modern style, this large locking mailbox is an excellent choice for anyone looking to protect their mail and enhance their property’s exterior.

  • Crafted from thick galvanized steel with a durable powder-coated finish, this outdoor locking mailbox is built for long-term strength and reliability. The sturdy metal construction resists rust, corrosion, and everyday wear, ensuring dependable performance in outdoor environments.
  • Designed with a strong key lock and reinforced anti-pry latch, this mailbox helps prevent mail theft and protects important letters, checks, and small packages. The secure locking design ensures only authorized users can access the mailbox contents.
  • With a spacious 21" x 11.2" x 10.5" interior capacity, this mailbox easily holds multiple days of mail, magazines, envelopes, and small parcels. The wide mail slot allows postal carriers to deliver mail smoothly while maintaining security.
  • The mailbox features a protective powder-coated surface and a tightly sealed structure to help keep rain, snow, and dust away from your mail. The weather-resistant design helps maintain durability and protects contents in different outdoor conditions.
  • The sleek black design blends well with most homes, offices, apartments, and commercial buildings. Its clean modern style enhances curb appeal while providing practical mail security.

All orders placed online by 3:00 p.m. Eastern Time will usually be processed and shipped within 24-48 hours. Most standard shipments should arrive in 1 to 6 business days depending upon routing and the distance of the shipping address from our warehouse location.