This is the most functional mobile wallet available! The kit-case Slim Wallet holds five (5) pieces of plastic, three (3) business cards, two (2) folded bills, and a HOUSEKEY -- all in a secure, sturdy, and sleek design. And with kit-case, it is just one click to remove the Slim Wallet from the back of your smartphone. Great for everyday use and traveling. With the kit-case Slim Wallet you can leave your old wallet behind!