- A complete geometry set: 1 compass, 1 pen, 2 triangles, 1 ruler, 1 protractor, eraser, pencil lead refill, and a shatterproof storage box. Heavy duty metal compasses will not bend during use, and the ergonomically shaped compass head sits comfortably in the hand. The compass with universal holder works with any standard size pencil or ballpoint pen. Rulers, triangles and protractor feature graduations for easy identification. - Easy to carry and store: A durable plastic sleeve protects the tools and keeps them together in a backpack or on a desk. Easy to carry and store for school, office, home or work. - A versatile tool for multiple functions: Suitable for students, teachers, math experts, architects, engineers, artists and designers at any level. A solid gift choice for children and friends, easy to take to lessons and store in the classroom. - Practical use scenarios: Use in class demonstrations to illustrate compass and angle concepts; complete geometry homework and create diagrams with precise circles and angles; support art, drafting or design projects requiring accurate measurements and constructions.