Multifunctional Ruler:- The multi-function drawing ruler can meet the needs of students of different ages, such as: elementary school, junior high school, high school, university, we also provide a good drawing experience for teachers, designers, and cardboard teachers and helps Can , Circles, Rectangles, And Triangles, Also Draw Cylinders, Cones, Cubes, Parabolas, Golden Sections, Bisectors, Vertical Lines etc .