Lowest Prices on Mailboxes, Period.

Gaines Keystone Post Mount Locking Mailbox

  • Gaines Keystone Post Mount locking mailboxes is one of our top selling residential mailboxes. With 28 different finish combinations and so many post mounting options it’s easy to see why.
  • Made from durable cast aluminum and finished with a next generation powder coating, this mailbox is virtually maintenance free. Wipes clean and will never rust.
  • Powder coat is available in several color options and complimented by antique bronze, verde brass, polished brass and satin nickel accents for a unique locking mailbox that looks exactly the way you want.
  • Add your address to the side of the mailbox in matching accent colors for a personalized look.
  • Look to Gaines products for lasting beauty and style. Complete the look of your home’s exterior with a Gaines HouseMark Address Plaque, available to match your mailbox.
  • Locking insert has an ample sized slot for daily mail delivery and protects you and your loved ones from the threat of identity theft. Comes with 2 keys.
  • Designed for long-life and USPS approved, Gaines Keystone Post Mount locking mailbox is the only mailbox you’ll ever need.
Available Finishes And Accents
 
Keystone Mailboxes Metallic Bronze Antique Bronze
Metallic Bronze with
Antique Bronze
gmmks20a-mbz
Keystone Mailboxes Metallic Bronze Polished Brass
Metallic Bronze with
Polished Brass
gmmks4a-mbb
Keystone Mailboxes Metallic Bronze Satin Nickel
Metallic Bronze with
Satin Nickel
gmmks24a-mbs
Keystone Original Mailboxes Black Antique Bronze
Black with
Antique Bronze
gmmks21a-blz
Keystone Original Mailboxes Black Polished Brass
Black with
Polished Brass
gmmks7a-blb
Keystone Original Mailboxes Black Satin Nickel
Black with
Satin Nickel
gmmks25a-bls
Keystone Original Mailboxes All Black
Black with
Black
gmmks19a-bl
Keystone Original Mailboxes White Antique Bronze
White with
Antique Bronze
gmmks22a-whz
Keystone Original Mailboxes White Polished Brass
White with
Polished Brass
gmmks1a-whb
Keystone Original Mailboxes White Satin Nickel
White with
Satin Nickel
gmmks23a-whs
Keystone Original Mailboxes All White
White with
White
gmmks15a-wh
Keystone Original Mailboxes Almond Antique Bronze
Almond with
Antique Bronze
gmmks26a-amz
Keystone Original Mailboxes Almond Polished Brass
Almond with
Polished Brass
gmmks3a-amb
Locking Insert
 
Gaines Keystone Original Mailboxes Locking Insert
 
Bottom View - Mounting Holes
 
Keystone Mailboxes Bottom View Mounting Holes
 
Optional Mailbox Posts
 
Gaines Keystone Original Mailboxes Standard Post
Standard Post
Gaines Keystone Original Mailboxes Deluxe Post
Deluxe Post
Order Your Mailbox
Our Low Price: $297.00FREE SHIPPING
Availability: In Stock Ships In 1 Day
Quantity
Finish and Accents
Keystone Mailboxes Finish Options More Info
Post
Gaines Keystone Post Options More Info
Side Address
Side Address For Mailboxes More Info
Mailbox Details
Item Number:
  • Mailbox
  • GMMKS
  • Locking Insert
  • GMZMKSLOCKING
Includes:
  • Mailbox
  • Locking Insert w/ 2 Keys
Locking Mailbox Locking Mailbox
Size:
  • 12-1/4"H x 10-3/8"W x 20-1/8"D
Weight:
  • 18 lbs.
Manufacturer:
  • Gaines Manufacturing
Fedex ExpressFedex Ground
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