Creating adjustable circles: A mathematical ruler that creates a perfect circle in seconds. Can be used as a 360 degree system for students and college students. Used for engraving, carpentry, sewing, designing and lifting. Professional tools: Our round tools are finely polished and finely polished to provide you with high-quality professional products, with high precision, light weight, small size and easy to carry. High quality: Made of aluminum alloy and stainless steel, good corrosion resistance, not easy to rust. Versatile: Can be used with pens, pens, markers or spray guns. Can be used for 2D flat or spherical objects (containers, bowls, decorations). Note: If you don't feel smooth when you use it for the first time, please rotate it several times or add a little smooth powder to the rotation or add a smoothing agent. It can be used very well. Product Description Size: 12.5 cm | Color: Gold Features: It is a completely revised tool for drawing and measuring perfect circles. Made of aluminum alloy and stainless steel, good corrosion resistance, not easy to rust. Its circumference can be increased or decreased . It can be used to draw round measurements, etc. It is an easy-to-carry plotter and can be used in industry. Simply turn the rings to open and close the fascinating opening mechanism. Features: Type: circular drawing tool. Materials: aluminum alloy and stainless steel. Color: golden. Size: about 12.5cm. Contents: 1 tool for drawing circles. Note: Please allow 0-1cm error due to manual measurement. Please only order if you accept this margin of error. The color of the item may differ from the photo depending on your computer's display and light settings.