Carries up to 4 cards Safety tab keeps cards in place Attaches to phone or hardshell case Keep your most important cards with you at all times with this slim and convenient phone wallet. Holds up to four cards securely and attaches to the back of your phone or case using strong, reliable 3M VHB. The safety tab keeps your cards in place while the easy-slide window makes it simple to access your cards. Carries up to 4 cards.