Bests & Worsts Reviews from Amazon

It is very easy to use and does fit in my wallet, but was completely ineffective at stopping any of the readers that I tried on any number of different cards. It still scanned at home Depot, Walmart, and the gas station, etc. I also tried using it with the security badges at several facilities and they all still worked as they always have. Neither did it stop a mag strip or an RFID badge. I gave this every opportunity to do something effective and it did not do any of them I'm not saying it doesn't work on something but it didn't work on any of the security measures that I needed or was after.