Dri Mark Counterfeit Test pen and UV detector

NewDri Mark Counterfeit Test pen and UV detector, which authenticates currency by detecting bad bills and security threads. The pen reacts with the paper stock of counterfeit bills, turning the mark dark, while genuine bills will show a clear or amber mark. The UV light reveals the hidden security thread in genuine US currency, which is different for each denomination. impeccable for everyday use. superior materials and excellent craftsmanship ensure long-lasting durability.