These gimmicks are the most powerful tools a magician or mentalist can use. It's really very difficult to believe that with such a little and inexpensive gimmick, you can produce the quality and the quantity of effects that look like real miracles.
You can write letters, numbers, check marks, etc.surreptitiously, in front of the audience, giving the impression that it was written well before the event or effect. It gives you limitless possibilities.
These writers are refillable and include a pin to help extract the lead and Instructions.