Complete Set: You will get 4 pieces of math geometry tools, including a 12 inches/30 cm straight ruler, 2 pieces triangle rulers (30/60 and 45/90 degrees) and a protractor, complete set to meet the needs of basic geometry work, Double Scale Ruler: The straight ruler and triangle ruler have inch and metric scales for the ease of all consumers and meet your different needs. Both sides of the protractor can measure 0-180 degrees, and the scale is accurate to 1 degree, Quality Material: This ruler set is made of quality plastic, which is durable and sturdy, with high elasticity, not easy to break and crack, no incisive edges, a practical measuring tool for designers, architects, engineers, students and so on, Easy to Read: With a transparent clear design, these plastic rulers allow you to clearly see the pattern or text under the ruler, which can help trace and draw the ultimate lines, angles and circumference for an accurate equation, Wide Applications: These straight ruler, triangle ruler and protractor set is suitable for math education, classroom teaching, class, office, home, school crafting, etc, A practical gift to students, teachers, designer, family, friends