The leading high-security KNOX-BOX® has a special application for U.S. Postal Service use. The Knox Postal Key Keeper holds keys, access cards, and other small items necessary for postal access.
The Knox Postal Key Keeper is designed to accept official USPS locks issued and installed by your local postal authority. The key keeper allows postal carriers to retrieve the key to your building and deliver the mail while maintaining proper building security.
Three Interior Options