It is no secret that spies have all kinds of tools that help them get away with some of the things they do. This coin holder is useful if you plan to carry a Micro SD card with top secret information you have stolen. The rest of us will probably lose our Micro SD cards so fast with these but that’s a whole other story. These coins don’t open accidentally and can’t be opened without the supplied opening device. Fun little covert coins if you want to play spy once in a while.