One of the questions I hear quite frequently is: Where should I hide my extra car key? I used to use the Hide A Key which is a small box with a super heavy duty magnet and normally it will attach and stay on any part of the undercarriage of your vehicle.. but when the flood came into Nashville a few years ago, I had went downtown Nashville to do a job and the water washing under the van washed my super heavy duty magnetic box hide a key away.. so I came up with a better idea that it wont wash away! Get a copy of the key you are wanting to hide.. (make sure it works before you hide it) But the key in a vice and using a 1/4″ bit make the hole in the key a little bigger and more round Unscrew the license plate Line up the key with the hole Put the screw back in! And there you go! A key that wont fall off your car, No matter what flood comes your way!