Sturdy construction: Made from quality materials, this protractor is built to withstand daily classroom or office use without bending or warping. Clear and accurate scale: Features a readable scale with clear graduations for precise angle measurements, making it ideal for teaching geometry and drafting. for drafting and design: The 180° protractor is essential for drafting and designing in a variety of creative projects, including technical drawings and architectural plans. Easy to use: The large 20x11 inch size and builtin handle provide a comfortable grip for precise measurements and smooth operation. Use scenarios: In math classrooms to demonstrate and practice angle measurement and geometry concepts. In drafting environments for technical drawings and architectural plans that require accurate 180° measurements. In design projects to lay out layouts, templates, and project plans with consistent angles and measurements.