You can make a card case without a sewing machine or rivets. It can be used for business cards, other cards, a small wallet, or a pill case. It has various uses. It would look cool if you put your own brand stamp on it! Ideally, you would use a press machine, but if you don't have one, you can also punch it out by hitting it. Place the leather on the die. Try hitting it with a rubber mallet or a wooden mallet. Be careful not to touch the sharp blade.