Description: 【Specially Designed for the Visually Impaired】: This stationery set is tailored for individuals with visual impairments, featuring clear tactile markings and Braille indicators to facilitate measurement and learning 【Comprehensive 9 Piece Set】: Includes essential tools such as a protractor, ruler, right angle triangle ruler, special angle triangle ruler, compass, abacus, soft tape measure, 4 line Braille writing board, and writing pen, great for various mathematical tasks 【User Friendly Tactile Tools】: Equipped with raised vertical lines and grooves for easy centimeter measurements. Even numbers are marked in Braille at the bottom for quick identification 【Material】: Made from PP to ensure durability and maintain its shape and functionality over time despite frequent use 【Ideal for Educational Use】: Great for classrooms or home learning environments, this set provides visually impaired students with essential tools to effectively engage in mathematics education Specification: Material: PP  Size Chart: 21.8cmx4.4cmx0.7cm/8.58inchx1.73inchx0.28inch Ruler Length: 20cm/7.87inch 4 Line Braille Board: 21.8cmx4.4cmx0.7cm/8.58inchx1.73inchx0.28inch Package Includes: 1 Protractor 1 Compass 1 Ruler 1 45 Degree Set Square 1 30 Degree Set Square 1 Writing Pen 1 4 Line Writing Board 1 Abacus 1 Ruling Ruler Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.