I designed this card holder for my brother who is a BMW car seller, he wanted a cool holder for his business cards to decorate his desk I added a gap to insert a pen or any cylindrical item I added another gap on the back of the model to insert an nfc tag ( round 25 mm diameter, 1 mm thick ) so I could record his contact info and customer can read it with their phones A nfc logo is attached on the back, over the nfc tag gap, to show where must be placed the phone to scan the tag