Description: 【Innovative Design for Accessibility】: This Braille Protractor is specifically designed for visually impaired individuals, combining a protractor and drawing tools into a practical teaching aid. The double layer design features a blue semicircular instrument with a white pointer on top and a blue base with a red rotating arm underneath 【Angle Measurement】: The Braille School Braille Protractor is marked in 5-degree increments, starting from 0°, with unique raised patterns for easy identification by touch. Circular patterns mark every 30 degrees, diamond shapes at every 15-degree interval, and elongated bar at the central 90° point ensure accurate angle measurement 【Braille Integration】: Key angles such as 45°, 90°, and 135° are labeled with Braille markings to facilitate learning and usage by those who read Braille, enhancing the educational value of this Math Geometry Tool Ruler 【Material】: Made from sturdy plastic, this Braille Ruler is built to withstand regular use while maintaining its functionality over time. Its dimensions of 7.09inchx9.45inchx0.20inch, make it compact yet effective for various educational activities 【Comprehensive Package】: The package includes a complete set of tools that can emboss evenly distributed Braille dots onto paper through its corresponding raised structures on the blue base, making it an essential addition to any visually impaired individual's toolkit or classroom setting Specification: 18cmx24cmx0.5cm/7.09inchx9.45inchx0.20inch Package Includes: 1 Braille Protractor Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.