Signature Keystone Post Mount Locking Mailbox

  • With the Gaines Signature Keystone Locking Mailbox collection it’s easy to get everything you want.
  • Made from cast aluminum and covered with a powder coat pain finish that will never rust, you can count on these locking mailboxes to be low-to-no maintenance.
  • Available in 6 colors and 4 accent finishes creating a unique mailbox designed just for your home.
  • Raised US Mail letters cast a shadow and add dimension to the mailbox front.
  • Letters and Flags are made of solid brass or aluminum and come in Verde Brass, Satin Nickel, Polish Brass and Antique Bronze finishes.
  • Personalize your mailbox by adding your street name and address to the side of the mailbox in 7 year vinyl letters that match the color of the locking mailbox's accents.
  • Need an address plaque for your house? Check out our selection of Gaines HouseMark address plaques which coordinate with our Signature Keystone Post Mount Locking Mailbox collection.
  • Each USPS approved locking mailbox comes with a locking insert and 2 keys. Order yours today!
  • See more Locking Mailboxes.
Available Finishes And Accents
 
Keystone Signature Series Locking Mailbox - White with Polished Brass
White with
Polished Brass
#KS-1A
Keystone Signature Series Locking Mailbox - White with Verde Brass
White with
Verde Brass
#KS-11A
Keystone Signature Series Locking Mailbox - White with Antique Bronze
White with
Antique Bronze
#KS-22A
Keystone Signature Series Locking Mailbox - White with Satin Nickel
White with
Satin Nickel
#KS-23A
Keystone Signature Series Locking Mailbox - Black with Polished Brass
Black with
Polished Brass
#KS-7A
Keystone Signature Series Locking Mailbox - Black with Verde Brass
Black with
Verde Brass
#KS-12A
Keystone Signature Series Locking Mailbox - Black with Antique Bronze
Black with
Antique Bronze
#KS-21A
Keystone Signature Series Locking Mailbox - Black with Satin Nickel
Black with
Satin Nickel
#KS-25A
Keystone Signature Series Locking Mailbox - Metallic Bronze with Polished Brass
Metallic Bronze with
Polished Brass
#KS-4A
Keystone Signature Series Locking Mailbox - Metallic Bronze with Verde Brass
Metallic Bronze with
Verde Brass
#KS-14A
Keystone Signature Series Locking Mailbox - Metallic Bronze with Antique Bronze
Metallic Bronze with
Antique Bronze
#KS-20A
Keystone Signature Series Locking Mailbox - Metallic Bronze with Satin Nickel
Metallic Bronze with
Satin Nickel
#KS-24A
Keystone Signature Series Locking Mailbox - Almond with Polished Brass
Almond with
Polished Brass
#KS-3A
Keystone Signature Series Locking Mailbox - Metallic Charcoal with Polished Brass
Metallic Charcoal with
Polished Brass
#KS-5A
Keystone Signature Series Locking Mailbox - Metallic Charcoal with Satin Nickel
Metallic Charcoal with
Satin Nickel
#KS-9A
Keystone Signature Series Locking Mailbox - Forest Green with Polished Brass
Forest Green with
Polished Brass
#KS-6A
Locking Insert
 
Keystone Signature Series Locking Mailbox - Locking Insert
 
Bottom View - Mounting Holes
 
Bottom View - Mounting Holes
 
Order Your Mailbox
Our Low Price: $287.00
Free Shipping Available
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Mailbox Details
Item Number:
  • GMMKSSIG, GMZKSLOCKING
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.
Leaves Warehouse In:
  • 1-2 Days
Fedex ExpressFedex Ground
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