4 Jewelers 3X 5X 10X Eye Loupes Folding Magnifier Tools 10X Double Lens Folding Magnifier. This is a new double lens folding magnifier. Both lenses are 5X and you can combine the two for a total of 10X power. The powerful magnification may help reduce eye strain. It is convenient for your home, office and travel. Enlarges fine print in books, maps, newspapers, directories, legal documents, etc. The 5X lens has a 2" (51 mm) focal distance and the 10X has a 1" (25 mm) focal distance. It measures approximately 3 5/8" x 1 11/16" (92 x 43 mm) open and about 2 1/8" x 1 11/16" (54 x 43 mm) closed 3 Eye Loupes. This is a new set of 3 eye loupes. These have quality lenses for extra sharpness and clarity. They are perfect for examining stamps, coins, circuit boards, etc. You receive: One 10X eye loupe with a focal distance of 1" (25 mm). One 5X eye loupe with a focal distance of 2" (51 mm). One 2.5X eye loupe with a focal distance of 3" (76 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.