Pen Thru Bill
This specific pen is perfect for modern/plastic bank notes and is very believable.
Pen Thru Bill :
This is close to a miracle and will get you gasps. You push a pen through the centre of a borrowed bank note such as a £20 or $20, puncturing a hole right through the money You then remove the pen from the hole and the damaged note visually fixes and restores back to new condition, leaving it completely unharmed. And now the note and the pen are both examinable. This is an amazing moment and this gadget does all of the work for you.