Card Protection- The interior is lined with soft nylon material that prevents the cards from rubbing against each other and against any keys and metallic objects that you may have to carry in it. There are supple side pockets, pouches and compartments inside that are specifically designed for your drivers license, credit and debit cards and ID cards. If you ask for it, the manufacturers will also add a key ring to the outside which will make it much more easier to carry around and lock on to your handbag or your belt. Snap protection and hardiness- Aluminum may be the lightest material possible but it is extremely hard. Usually, dropping any kind of metal case will mean a dent or a scratch on the surface of the casing resulting in a permanently scarred casing. However, that is not the case with the Aluminum Wallet.