http://www.nusetlock.com/
The NuSet 2050 LockBox is one of the most popular lockboxes and for good reason. It features an all-steel body that keeps all the keys inside safe and secure, and it comes with a scratch-resistant black powder coating finish. The convenient rain jacket protects the lockbox from damage from harsh winds, rain, and snow.
The combination for this lockbox comes in both numeric and alphabetical combinations, and you can request the combination of your choice when you order your unit. This particular type of lockbox affixes directly to the exterior of your building, and it comes with the necessary hardware to install it on your own. The convenient included template makes installation quick and easy. Should you ever want to change the combination, you will need to use the key that comes with the unit. This means that no one but the key holder has access to change the combination.
If you are looking for a way to keep your property safe and secure while allowing authorized personnel to gain access to the building's keys, invest in the NuSet 2050 LockBox for ultimate security.