The Metal RFID Card Holder is made of aluminum and ABS materials, with laser engraving print to highlight your design. It helps people to avoid protection from electronic ID theft for most cards. Push up the button at the bottom to make the card information clear at a glance, and fits up to 6 cards. It's a great promotional tool for helping make it more difficult for thieves to skim data and decreases the risk of digital pickpockets.