[Geometry Compass Precise]- Quick adjustment of the compass legs and fine adjustment with a central drive wheel. interchangeable lead and needle insert. With spring bow head and center wheel prevents unintentional leg movements. [High quality metal compass]- These compass sets are made of sturdy metal, stable center drive spindle, stronger than plastic compasses. They can be used for a long time. [Chic design]- Lead and needle shanks can be bent. Our compasses are particularly stable and offer you an optimal basis for precise drawings at school and at work. Meet your different needs. [Wide Application]- This suitable for kids and adults, great for school, woodworking, workshop or home. it is the best circular drawing tool for students, artists, mathematicians, etc. [Easy to Carry]- Drawing compass is put in a transparent bag. Easy to identify, store and carry. The compass length is 15cm. Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object received.