This set contains 4 multifunctional geometric rulers, suitable for different purposes including various graphic drawing. Whether you are an artist, student, or pattern maker, these rulers are a good helper for your work or study. Made of plastic with a lightweight design, more convenient to carry. The edge design makes it easy to use. Transparent color as shown in the picture, drawing on white paper will not affect vision; easy to distinguish the scale, not easy to skew, convenient to observe and use. You can draw circles, triangles, cylinders, cubes, parabola, parallelogram, Y-axis, angular bisectors, cones, and more quickly. Perfect for discovering more possibilities with your child. These multi-functional rulers can be widely used on various occasions, ideal as gifts for students, teachers, or classmates to show your gratitude and concern. Package Contents: 4 pcs multifunctional geometric ruler drawing tools (including different types as shown). Note: Light and different displays may cause the color of the item a little different from the real thing. The measurement allowed error is +/- 1-3cm.