EXTENDED DESIGN: This circle drawing tool features an adjustable aperture mechanism that allows for precise control over the circle's diameter. Simply rotate the mechanism to either expand or contract the circle size, making it perfect for detailed measurements in various projects. USER-FRIENDLY OPERATION: To use, simply position the tool at the desired location, adjust the central circle's size by rotating the gold mechanism, and trace your perfect circle with ease. This tool is designed to simplify your drawing process without sacrificing precision. VERSATILE APPLICATION: Ideal for a wide range of activities, this circle maker tool is perfect for woodworking, DIY projects, and more. Its ease of use and adjustability make it a must-have tool for both professionals and hobbyists alike. Color: As Shown Material: plastic Package Contents: 1*Circle Drawing Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.