Features: Circle drawing tool is made of stainless steel, good corrosion resistance, not easy to rust. Easy to use. A mathematical ruler that seamlessly creates a perfect circle in seconds. Can be used as a 360-degree metrics of students and students in school. This is a portable plotter for industrial use. It can be used to draw circular measurements, etc. It can be large or small. Suitable for woodworking enthusiasts, is a good helper for designers. Used for engraving, carpentry, sewing, sewing and hoist design.