The 5 Pack Jot Counterfeit Money Detector Pen Marker is a set of pens designed to detect counterfeit currency, specifically fake dollar bills. Made of plastic and manufactured in China, these pens are equipped with a specialized pen tip that can instantly detect the authenticity of money bills. Perfect for use in retail, point-of-sale, and money handling settings, this product from Jot is a reliable tool for businesses looking to prevent the use of counterfeit currency.