MAIN FEATURES: [ Premium Material ] Drawing tool is made of high quality Aluminum Alloy and Stainless Steel, its durable and not easy to rust, with good hardness, high strength, good corrosion resistance, easy to operate. [ Adjustable ] Diameter size can only be adjusted between 10mm and 77mm. Circle tool can be used to draw round measurements and so on. It can be adjusted, can be large or small. Simply rotate the rings to open and close its captivating aperture mechanism. [ Easy To Use ] The diameter turn to larger by rotating clockwise, smaller by roteting counterclockwise. This is an easy to carry plotter, precision gauge, and can be used in industry. [ Multipurpose ] Round circle template ruler tool is a great tool for students, carpentry. Can be used as a 360 metrics for students and school students. Also ideal for engraving, carpentry, sewing, sewing and hoist design. Circle drawing tool is a math ruler that seamlessly creates a perfect circle in seconds. With this meter, you dont have to worry about the circle being drawn. The drawing tool will not easily move during use to destroy the drawn pattern. It can be adjusted at any time during the use; flexible and convenient,and the circle drawing tool can be reused for many years. SPECIFICATIONS Measuring Round Compass Stretch Ruler Product diameter: 12.5CM Material: stainless steel colour: yellow Package Contents: 1 x circular drawing ruler 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.