Locking Insert for Keystone Mailbox

Gaines Keystone Mailboxes Locking Insert
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Retail Price:$56.32
Our Price:$48.97
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  • In Stock
  • Ships in 1 Day.
  • Never worry about mail theft again
  • This lockable insert box turns all new or existing Gaines Keystone series decorative mailboxes into a locking mailbox
  • This lock box is constructed of extra-strong powder coated sheet aluminum with reinforced hinges giving you more mailbox security
  • Simply insert your access key to retrieve your mail
  • The lock box leaves enough room above for your outgoing mail
  • Check with your local postal carrier to determine if the lockable insert box option is approved in your area
  • Mail boxes Are Not Included
  • View the Gaines Keystone locking mailbox
  • View more Decorative Post Mount Mailboxes
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Product Details


Item Height (inches) Width (inches) Depth (inches)
Insert Box 5.75" 9.125" 18.5"
Mail Slot 1.5" 7"


  • Part Item Number: GMZMKSLOCKING
  • Includes: Lockable Insert with 2 Keys
  • Manufacturer: Gaines Manufacturing
  • Shipping Weight: 3 lbs.

Additional Images

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