Does anyone use a security box to keep there extra keys in, or cash they happen to have on them for a short ammount of time. I have one that has a digital keypad and hard key that I got from Cash Boxes and Security Boxes. It's fire and water proof, and someone would definately have to go through some trouble to get it open. I also have a safe where I keep the real stuff, but that can be a hassle to access a spare key.