I have used an aluminum wallet for my licenses and credit cards for the past two years, similar to this Sharkk brand.  I think they are great.  They hold 10 cards and licenses and that meets my needs.  Essentially this is a plastic case with an aluminum exterior and with seven pockets to hold the cards.  It is quite similar in construction to the Ogon brand that I used before but much less costly.  The advantage of this type of wallet is that it fits well in your front pocket and, for a woman, in her purse.  They claim that it blocks radiation, but I can't verify that.  The principal weakness in the previous wallet I owned and in this one is the latch.  It is made of plastic and if one overloads the wallet, the latch breaks, which is what happened to me.  It needs a metal latch and the company that produces one with a secure metal latch will get my business in the future.  But if you can stay within the ten card limit, this wallet should serve you well.  It is because of the latch that I rate this product with four stars.