Hi-power optical quality distortion-free lens with handle. Shatter proof and scratch resistant. For reading small print, contracts, telephone directories, stock listings, maps, charts, stamps, and coins. 2 in. round magnifier has 3X power lens, no bifocal.�?� 3 in. round magnifier has 2x power lens, with 5x bifocal insert.4 in. round magnifier has 2x power lens with 6x bifocal insert.