I purchased this safe because it has 2 methods of entry: a customizable PIN, and a physical key. Entering the wrong code will cause the safe to go into lockout mode for 5 minutes, but using the physical key can override the lockout mode at any time. I purchased this because of the mounting option, and the shelf (2 levels of storage). I mounted my to the wall (at ground level) using my own hardware, but I believe the hardware that is included with this safe is for floor mounting. This model is NOT fire-proof.