Fangrui Product Details [multifunctional Ruler]: This Is A Multifunctional Geometric Ruler. In Addition To Basic Straight Lines, Circles, Rectangles, Triangles, Our Rulers Can Also Draw Cylinders, Cones, Cubes, Parabola, Please Note: To Improve The Drawing Accuracy, Please Use Fine Pen Drawing [precise And Clear]: Ours Is Made Of High-quality Plastic, Transparent Material So That You Not Ignore Some Important Numbers Or Words When Drawing, The Scale Is Clear And Accurate, Wear-, Do Not Worry About The Long Time The Scale Be Blurred [high-quality Material]: Made Of High-quality Plastic. , And Easy To Carry, Our Products Have A Certain Thickness. When You Are Drawing, The Ruler Not Slide Easily, Allowing You To Draw With Peace Of Mind [a Variety Of Graphics]: A Variety Of Geometric Figures Of Different Shapes Are Placed On A Ruler, Which Is Very Convenient To Carry, Can Meet Your Different Needs In Daily Use, And Is Convenient For Measurement. [wide Range Of Uses]: Whether You Are An Artist, Student, Pattern Maker Or Designer, Th