My wife bought me a key lock box that fits on my license plate. The thind is too cool. Check it out www.keys-ok.com
looks like a great idea except for advertising where your keys are. not sure I really like that.
Sure the keys are there and maybe your telling the world, but if someone wants your car they’ll take it. The darn thing is solid – made from stainless steel. I’ve been using it for a couple of weeks with no problems.