Highly effective and inexpensive tool for detecting bad bills and deterring counterfeiters from passing phony currency in the first place.
- Simply make a small mark on U.S. currency.
- Chemically sensitive ink works instantly.
- An amber mark passes the test, while a dark brown or black mark means the bill is probably counterfeit.
- Works on all new design U.S. currency (bills series 1959 and later).
- Pen-style for extreme portability.