The DUGRAFT ultra-slim card holder is made of a sturdy aluminum shell to prevent IDs and credit cards from being squeezed and uses advanced aluminum technology to protect credit cards from unnecessary wireless communications, its compact body is easier to carry and put in any pocket. View more details at： https://vulkit.com/products/dc103-slim-built-in-airtag-slot-card-holder?_pos=1&_sid=dd626bf9b&_ss=r&variant=43518947754227