This is not your run-of-the-mill Fresnel Magnifier! Many of the pocket magnifiers offered out there are only 2x. Our new Fresnel Magnifier has 4X power magnification and is great for all survival kits, travel safety kits, or carry one in your wallet. It can be used as an additional firestarter on sunny days, or as a magnifier when glasses are lost or broken. We had a blaze orange case made for it so you can find it easily. Measures 2" x 3-1/4" (Case measures 2-3/8" x 3-11/16"), and only 0.4mm thick. Weighs only 0.1 oz., and is also available in a 6 Pack.