1. Stainless steel construction, durable material, professional tool.
2. Compass stand, 2 ruling pen, 1 extender, 1 replacing head and refill.
3. All packed in a protective transparent box, portable, convenient to carry.
4. Compass geometry tool set for engineering drawing, sketching geometric graph.
5. 5 pieces math geometry tools set especial suitable for school teaching use. It is good math tool set for school.