Self-inking stamp = instant business card. Stick one of these on your key ring and you'll never worry about that missed connection again. With the technology of cell phones and the internet, a business card may seem superfluous - as it's only remaining purpose is to leave an impression with someone. Believe it or not, all you need is the 3/4" design radius of this stamp to do that! Brilliant concept by designer Mikey Burton of Designy Illustration.