DRI 351BCLThe Dri Mark Smart-money Counterfeit Bill Detector Pen with Coil and Clip (DRI 351BCL) is a currency-screening device designed for businesses that handle cash transactions. It is suitable for retail environments or any setting where on-the-spot verification is needed to mitigate financial risk from fraudulent bills. Users mark a small line on U.S. currency; an amber mark indicates a genuine bill, while a black or dark brown mark suggests the bill is suspect. This pen is intended to be used as pa