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The Mail Boss Base Plate allows you to secure a mailbox post to a variety of surfaces, including concrete or asphalt. Generally, the Mail Boss Base Plate should be used with the 27" Surface Mount Post; however, in some unusual applications the Base Plate may be used otherwise. Constructed of 10-gauge galvanized steel for strength and stability. Features a durable powder-coated finish.
From the Manufacturer
The Mail Boss Base Plate allows you to secure a mailbox post to a variety of surfaces, including concrete or asphalt. Generally, the Mail Boss Base Plate should be used with the 27" Surface Mount Post; however, in some unusual applications the Base Plate may be used otherwise. Constructed of 10-gauge galvanized steel for strength and stability. Features a durable powder-coated finish.
Michelle Andre
Reviewed in the United States on March 4, 2025
I decided to keep it because it is very strong and add strengthto the post!!
THERESA C.
Reviewed in the United States on January 4, 2025
Post worked out fine.
Dman
Reviewed in the United States on February 12, 2024
Was not able to use it, as i required a pass-thru opening-this will not slip over a post; made to bolt down into hard surface, so drilling into concrete and using inserts is required. Otherwise, very impressed with heavy plate steel and weather proof coating-no painting necessary.. Item is pricey, but a great solution if you dont want to dig a hole and mount a 4x4 post in concrete; works well with metal 4x4 hollow post.
RPL
Reviewed in the United States on October 25, 2024
Well made. Solid. We bought a three-piece kit on Amazon.com including this, the post, and the mailbox.
Mr. S
Reviewed in the United States on April 9, 2024
I bought separately:Mail Boss 7528V MailboxMail Boss 7129 Surface MountMail Boss, Bronze 7158 Surface Mount Base PlateReplaced our 30 years old wood post with the Mail Boss brass Mailbox.It looks beautiful and sturdy and super easy to install.
Alexis
Reviewed in the United States on December 5, 2023
Used this to mount a mailbox on a post. Worked well.
Teop Tnomrev
Reviewed in the United States on December 2, 2020
You'll have to do some milling. These bases are designed to receive metal posts made by the same manufacturer, not standard 4x4 posts. So, that means the inside measurement is 3 3/8, not 3 1/2, let alone the 3 9/16 that's usually the real measurement of 4x4s.The customer didn't want me to tear up their deck in order to fasten the posts to the joists. I didn't want to either, as the deck screws (quote-unquote rust-proof) tend to rust and break unless they're stainless steel—making the removal of old decking dicey. These bases fit the bill and while they're not as rock solid as timberlocks fastened to a joist, they're still just about rock solid and I fastened them straight down with two timberlocks aligned with the joists.Photos attached so you can see what I had to do to prep the 4x4s. Used a joiner to slim the ends, then a router because the holes that receive the screws stick in about 3/16.
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