JEWELER'S EYE LOUPE Jeweler's Eye Loupe with dual swing-down lenses for 16.5x magnification. Lenses may also be used individually for 3.3x and 5x magnifications, respectively. The spring-loaded clip attaches to the side of your eye glasses. 1" diameter lenses. Great magnifier for jewelry-making, watch repair, hobby and craft work. This is a very useful aid when doing any type of close-up detail work, such as scale modeling, figure-painting, model railroad train engine repair, etc.