Key keeper boxes are used to store important keys in a secure place, giving access to only those authorized to enter the building. These key keepers are a simple and elegant solution for providing mail carriers access to your secure commercial mailroom. With all your keys in one place, you won't need to carry around a heavy key ring.
US Mail Supply carries both a surface mount and a recess mount key keeper. These USPS approved key keepers are commonly used to give mail carriers secure access to the key of a locked building so they can deliver the mail, although they can also be used for residents of a building to access a key.