Versatile And Universal - Precise centimeter scale for measurement. Easy to use for all levels of students, architects, engineers, designers, artists, teachers to draft, paint, draw school or office projects. Durable And Sturdy - The compasses for geometry are made of metal and the geometric tools are constructed of high-quality plastic, which are strong and can be used for years. Ergonomic Design - Greatly improves the safety and comfort of using the compasses, which work with pencils and leads, thus ensuring that users finish mathematical tasks or building plans with high efficiency. Portable With Storage Box - Packed with a shatter-proof case, the geometric toolbox is easy to carry and safe for keeping. You can easily put the measuring instruments in your pocket and the tool will come in handy as soon as you need it. Package Includes 10 Tools: 1 Metal Graphic Compass, 30-60-90 Degree Triangle, 45-90-45 Degree Triangle, 15cm/6" Ruler, 180 Degree Protractor, 8cm Pencil, Extra Lead Refills, Eraser.