Ensure your transactions are safe with the Dri Mark Counterfeit Bill Detector Marker Pens. This convenient dozen-pack features high-quality black markers designed to quickly identify counterfeit currency. Simply mark a small area on the bill; if the ink turns yellow, it’s likely fake! These pens are easy to use, portable, and perfect for businesses, retailers, or anyone handling cash. With a dozen in each pack, you’ll always have a reliable tool on hand. Protect your finances and gain peace of mind with Dri Mark's trusted counterfeit detection solution!