Adjustable Circle Maker: A math ruler that creates a perfect circle in seconds. Can be used as a 360 measurement system for students and students. For engraving, carpentry, sewing, designing and lifting. Professional Tools: Fine craftsmanship and anti-corrosion performance, our round tools are 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 pencils, pens, pencils, or spray guns. Can be used for 2D flat or 3D spherical objects (containers, bowls, decorations). RemaASDue: 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 or smoothing agent to the rotation, it can be used very well.