Package contents - 1 piece metal geometry drawing tool - 1 piece 30°/60° Geodreieck (triangular ruler) - 1 piece 45° Geodreieck - 1 straight ruler - 1 piece 180 degree math protractor - 1 box with 0.7 mm pencil leads - 1 eraser - 1 storage case Materials and measurement - Made from polypropylene and metal for durability and clear measurement - Each square ruler and math protractor features clear, easy to read scales - The storage case protects and carries the geometry tools in backpacks, school bags, or book bags Performance and safety - The metal geometry drawing tool can draw circles up to 23 cm in diameter - The tool has a sharp tip and should be used with care; keep it away from children Ideal applications - Suitable for mathematics, geometry, art, drawing, woodworking, and drafting - Easy to take to math class and store in the classroom Use scenarios - In math homework or exams where precise geometry construction is needed - In classroom projects requiring multiple rulers and protractors for accurate drawings - During woodworking or craft projects that require circles, angles, and straight lines