🧮 Unlock Your Math Potential! Lid with safety lock prevents accidental spills. Weighs only 1.91 g for easy transport. Everything you need for math mastery! Includes compass, protractor, and more! Sturdy tin keeps your tools safe and organized. Precision Ruler Safety Lock Lid All-in-One Pencil The STAEDTLER 557 10 Noris Maths Set is a comprehensive collection of 10 essential tools for students, including a compass, ruler, protractor, and set squares, all housed in a durable storage tin with a safety lock. Perfect for ensuring that young learners have everything they need for their math lessons.