EXCELLENT CONTACT SCALES - The eye-catching black and red scales of this drawing triangle maximum clarity on any background and allow accurate measurements on light sheets or dark presentation surfaces for consistently accurate results. Classroom Demonstration Tool - Equipped with a 32.5cm base and a height of 23cm, this oversized square makes a great classroom tool. It improves architectural drawing activities and simplifies pedagogical processes through clear and easy handling during demonstration. Angle Measuring Tool: The square with transparent protractor function allows accurate reading of angles. This precision enables accurate drawing and helps learners and designers achieve consistent results across different applications. 【Reliable Teaching Tool】With reinforced ABS material, this drawing triangle meets the demanding needs of educational demonstration and withstands heavy wear, a reliable solution for teachers' and students' hands-on learning activities. Upgraded Control The triangle ruler is designed with non-slip handle and red grip area, allowing stable handling and accurate drawing accuracy. It allows seamless execution of geometric patterns or layouts on smooth surfaces for educational and creative applications., Manufacturer: MRKU