Mail Boss 7147 Box Spreader Bar for Two-Mailbox Applications - Bronze

In this review the Mail Boss 7147 Box Spreader Bar is evaluated for homeowners and property managers who need a secure, tidy way to mount two curbside mailboxes on a single post. The bottom line: it is a tough, no-frills mounting accessory built from 12-gauge electrogalvanized welded steel with a durable powder-coated finish, and it delivers a solid two-mailbox solution when used with Mail Boss posts or compatible existing posts. Installers will appreciate that this review finds the spreader bar simple to fit, sturdy in use, and clearly intended as the mounting component only.

Key Features

• 12-gauge electrogalvanized steel: Provides a rigid, corrosion-resistant structure that keeps two mailboxes aligned and supported over time.
• Powder-coated finish: Adds weather protection and a clean bronze appearance that blends with typical curbside hardware.
• Two-mailbox mounting: Allows two Mail Boss style curbside boxes to share a single post, saving yard space and reducing post clutter.
• Hardware included: Ships with the necessary hardware to attach to a Mail Boss mounting post so most installations are straightforward out of the box.
• Compatibility: Designed to work with Mail Boss models such as Mail Boss, Mail Manager, and Package Master and with many existing posts.
• Spreader bar only: Intended as the mounting accessory; mailboxes and posts are sold separately, which keeps the component focused and durable.

Who It's For

The spreader bar is best for homeowners, landlords, and small property managers who already own Mail Boss curbside mailboxes or compatible units and want a tidy dual-mailbox setup on a single post. It is particularly useful where curbside space is limited or when adding a second mailbox without replacing an existing post.

Those who should look elsewhere include buyers who need a complete mailbox solution or a mounting post included, since this item is the spreader bar only. Also, installers using non-Mail Boss posts or wooden posts may need to buy additional fasteners beyond the included hardware.

Pros & Cons

Pros

• Sturdy construction from 12-gauge electrogalvanized steel provides long-term durability.
• Powder-coated bronze finish resists weather and keeps the mounting looking neat.
• Easy installation with included hardware when used with a Mail Boss mounting post.
• Good fit with Mail Boss mailboxes and a compact solution for pairing two boxes on one post.

Cons

• Included hardware is sufficient for Mail Boss posts but may be incomplete for wooden or non-Mail Boss posts.
• Not a complete mailbox kit; buyers must already have or purchase mailboxes and a post separately.

Specifications

Material	12-gauge electrogalvanized welded steel
Finish	Durable powder-coated bronze
Application	Mount two curbside mailboxes on one post
Compatibility	Mail Boss mailboxes (Mail Boss, Mail Manager, Package Master) and most existing posts
Includes	Hardware to install with a Mail Boss mounting post
Sold as	Spreader bar only; mailboxes and mounting posts sold separately

Our Verdict

The Mail Boss 7147 Box Spreader Bar is a practical, well-built accessory for anyone who needs to mount two curbside mailboxes on one post. Its heavy steel construction and powder-coated finish make it a durable choice, and it represents good value for those who already have Mail Boss boxes or compatible posts. Buy this if you want a reliable two-box mounting solution and are prepared to supply the boxes and, if needed, additional fasteners for nonstandard posts.

Frequently Asked Questions

Will this mount two mailboxes on any post?
It is designed for Mail Boss mounting posts and most existing posts; additional hardware may be required for wooden or non-Mail Boss posts.

Are the mailboxes included?
No, this listing is for the spreader bar only; mailboxes and mounting posts are sold separately.

Is the spreader bar weather resistant?
Yes, the 12-gauge electrogalvanized steel and powder-coated finish provide corrosion resistance and long-term outdoor durability.