SAITECH IT RFID Blocking Cards 5 Pack Premium Contactless NFC Debit Credit Card Passport Protector Blocker Set for Men & Women, Smart Slim Design Perfectly fits in Wallet/Purse (Black)

To my knowledge they work extremely well

Brilliant item and price. New years gift to our family and friends to keep them cards safe

Card protector works well.

So far been great not really had any problems but makes you feel safer.

Brought these card blockers and looking at reviews they work. So to be on the safe side i checked the card blocker with my credit card in my card holder.in my local fish&chip shop. To my supprise they worked so i am well impressed. Can honestly say i would recommend i also put two cards in my credit card holder to be doublely safe.

I read several of the 1 star reviews, it works if you use two cards and sandwich your credit card between them, I tested it on several different machines at restaurants and supermarkets and each time my payment would only work when I removed the credit card from between the 2 blocking cards. Very pleased with it.

Arrived when expected and looked exactly as displayed. Obviously cannot attest to their effectiveness as had not been scammed before or since.

Put these to the test on numerous occasions- quite simply- they work. A must in these complicated days where you can actually have your identity stolen by some geek sitting on a beach 10000 miles away! Tell that to your long dead grandparents and they'll think you'd gone ga- ga!

Used it at a friendly store to Tap and Pay, in various shielding positions. It works.

Cards tested and do work, but need to be very close to the credit cards. When I had 2 RFID cards in my wallet, they seemed to cancel each other out and my credit card was read.

It does the Job as a shield against scanning devices.

De verdad funciona como se describe!, lo compré con cierta duda de su funcionamiento, pero lo comprobé con varios lectores y con la tarjeta a un lado, y bloquea la lectura, es imposible que se lea la tarjeta NFC.

You don't know if it's working until somebody tries to scam you hopefully that won't happen but it seems like good insurance that's why I got it.