Guitar Pick Puncher
The best type of card to be used to make a guitar pick out of this guitar pick puncher is a hotel room card. The hotel room card is the thickest if compared to a credit card and a gift card. But what many people don’t know is that it can also be used to punch a CD (even better thickness and material compared to a hotel card). According to this guy on Reddit, if the part of the CD that’s about to be punched is heated up using a hairdryer, the pick will be punched out perfectly or otherwise the CD will crack and not form a complete pick.