The DM1 Wallet is a truly minimalist design – it’s a single piece of aircraft grade aluminum, cut into the ideal shape to positively retain up to 8 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. It only weighs 0.8 ounces (23 grams) – about the same as 4 credit cards. At only 3.53” x 2.38” x 0.36”, it is thinner than an iPhone 4 and just barely larger than a credit card.