"The world's most unique business card X-Ray visiting card Coolspice"

Someone in India's New Delhi has designed a one-of-a-kind business card. This kind of card, I believe, you will not be able to find another one anywhere in the world. It is to print the owner's X-ray of their hand along with their phone number on the card. However, I really can't understand if everyone uses this kind of business card, how would anyone remember what others' hand bones look like.