You've seen a jeweler's eye loupe used in jewelry-heist movies--the bad guy always seems to have one handy for examining the diamonds. In real life, they're an amazingly useful tool; sort of like a microscope you hold up to your eye to bring the smallest detail into view. This version has been improved with a flex-band that holds the loupe to your eye so you can keep both hands free. Great for mechanics, machinists, stamp & coin collectors, arts & crafts, photographers.