These are controlled key boxes that allow the fire department to obtain access to the boxes. Your rank and file member doesn't have access to it, only the officers and most departments have rather strict controls on this. However, I can tell that 9 times out of 10, we don't even use them, we just break in. I've got a thing called a K-tool than can rip a lockset out of the door in short order. I also know a number of way to defeat most retail store doors (cheesy). There's always axes and other implements of destruction.