Dual Mounting Post

One Post. Two Mailboxes. Complete and Ready to Install.

This bundle includes everything you need to mount two Adoorn mailboxes on a single post. By pairing the Dual Mounting Post Spreader Bar with the 51″ In-Ground Mounting Post, you get a clean, stable, and space-saving solution designed for shared driveways, neighbors, or side-by-side homes.

Built for proper height above ground and strong support below, this bundle delivers a complete mailbox setup that looks intentional from the curb and is made to last.

Mailboxes sold separately.

Mount Two Mailboxes on One Post

• Create a clean, shared mailbox setup by mounting two mailboxes side by side on a single post. Ideal for neighbors or shared driveways.

Proper Height with Added Stability

• The 51″ in-ground post goes deeper than standard posts, providing proper mailbox height above ground and stronger support below.

Designed for Adoorn Mailboxes

• Compatible with all Adoorn Post Mount Mailboxes, including both locking and non-locking styles.

Universal Mounting Pattern

• The spreader bar uses a standard 3.5 inch by 3.5 inch mounting hole pattern that fits most post mount mailboxes.

Built for Outdoor Durability

• Both components are made from heavy-duty galvanized steel with a powder-coated finish to withstand rain, snow, and everyday wear.

Stable and Secure Support

• A wide mounting surface helps reduce movement when opening and closing mailboxes, keeping everything aligned and secure.

DIY Installation Made Simple

• Includes instructions and all Hardware necessary: Hardware to attach two mailboxes & hardware to attach Dual Mounting Post Spreader Bar to the 51" In-Ground Mounting Post

What’s Included

• Dual Mounting Post Spreader Bar
• 51″ In-Ground Mounting Post
• Installation instructions
• All Hardware necessary: Hardware to attach two mailboxes & hardware to attach Dual Mounting Post Spreader Bar to the 51" In-Ground Mounting Post

Dual Mounting Post Spreader Bar Specifications

• Heavy-duty Galvanized steel with a powder-coated finish to prevent rust
• Color: black
• Dimensions: 26 inches wide x 6 inches deep x 0.25 inches high
• Hole spread: 3.5 inches x 3.5 inches
• Weight: 3.875 lbs

51″ In-Ground Mounting Post Specifications

• For installation into the ground only
• Heavy-duty Galvanized steel with a powder-coated finish to prevent rust
• Color: black
• Height: 51 inches
• Installation type: In-ground
• Installation Instructions following all USPS requirements included in package