Premium QualityThis geometric ruler is made of high quality PS, which is flexible and durable, not easy to break, not easy to scratch, with rounded corners, no sharp corners, and will not hurt your hands. Transparent and ClearThe ruler has a transparent design, clear scale, easy to draw and observe, more accurate drawing and higher efficiency. Multi-functionIt can draw various geometric figures, parabolas, functions, circles, ellipses, etc. It is both a ruler, a triangle ruler, a protractor, and compasses, which meet your different measurement needs. Wide ApplicationSuitable for students, teachers, pattern makers and designers, etc. It is a good helper for work and study, making you drawing faster and more convenient. AdvantagesHelp you draw efficiently, save time, combine variety of ruler functions, do not need to carry a bunch of measuring tools, portable and does not take up space.