The MR-20, MagniRule™ 1.5x Magnifier with 12 Inch Ruler is a clear acrylic, distortion-free 1.5x bar magnifier with a built-in ruler. The built-in ruler is conveniently scaled in both inches and centimeters. This lightweight ruler magnifier is perfect for home, office or school. Magnifying & measuring has never been easier!Simply place the magnifying ruler directly on reading material. The fixed focal distance will keep entire line of text in focus while reading. No more straining your eyes or losing your place.Great for reading small print, spreadsheets, graphs, charts, schedules and more.