The DM1 is a truly minimalist design – it's a single piece of titanium, cut into the ideal shape to positively retain as few as 1 and up to 12 identification or credit cards. The design eliminates any unnecessary parts, but securely and beautifully carries and protects your cards. It does NOT block RFID – so you can use building access cards and contact-less RFID credit cards without removing them from the DM1. The open front and back are ideal for photo ID cards like a drivers license. At only 3.53” x 2.38” x 0.51”, it is thinner than a deck of cards and just barely larger than a credit card. Our products are CNC Machined from a single billet of solid Titanium. There are no screws, hinges, snaps, magnets, straps or rubber bands to break. At 40 grams, it might be the lighest wallet that can carry 12 cards! Ti-Black coating is a beuatiful scratch-resistant industrial hard-coating.