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.

To shop the spreader bar (no post), click here.

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