Accurate Scale: The scale of the triangular ruler is clear and accurate, covering a variety of measurement marks. The set square can meet various measurement needs such as drawing and cutting. Whether it is drawing a straight line, measuring an angle, or determining a length, it can provide reliable data. Proper Size: Medium size, the set square is easy to carry and use. Whether it is for daily study or outdoor drawing, it can be easily put in the bag. High-quality Material: The set square is made of high-quality transparent plastic, sturdy and durable, not easy to wear and break. The surface is smooth, and the scale is not easy to fade, so it can maintain good use conditions for a long time. Practical Design: With yellow auxiliary parts in the middle for easy positioning and use. The beveled edge, straight edge, and angle measuring area are reasonably designed and easy to use, improving work and study efficiency. Affordable Set: One set contains 4 set square rulers to meet different usage scenarios. Whether it is student drawing or professional design, it can be easily handled with high cost performance.