Dri Mark 5 Pack Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 5)

The product works. We've used it in our workplace and found fake bills. Love this and woild buy again.

My significant other uses these at work and have no complaints at all. They work great, and haven't failed him yet. He has caught a few counterfeit bills, and they are the only pen he trusts and will use. Absolutely a great pen

Works as advertised

Great product with a great price that works perfectly detecting counterfeit money. If you leave the USA, grab some of these pens and take with you while traveling abroad to avoid fake US money bills in any of your exchanges on the road. Safe travels. Recommend. 5 stars.

Pens work as expected, but are a bit on the shorter side compared to what I'm used too. I also noticed that the pen cap doesn't have the tab thing that attachs it to your paper so there is no great way to tie it to the register so it doesn't get lost without a big glob of tape on it. I do like the fact that it comes with multiples pens for when they do get lost though! As far as I know, the pen is pretty accurate. The color eventually blends in with the money. You wouldn't want to use these pens for anything but checking to see if money is fake or not.