Adjustable: You can adjust the radius of the circle as you want to meet various drawing needs, so that you can save your time for consolidation and assembly. Dual-scale: circle drawing ruler has metric and imperial dual-scale, suitable for professional drawing. Easy to Read: They are not easy to smudge, fade, or disappear. You can read the measurements clearly for years on end. High Quality: Made of high-quality aluminum alloy material, the circular drawing tool is not easy to break from bending or rusting, more durable and sturdier than the plastic one. Easy to use: First, locate axis point at the center of your arc or circle on the wood next adjust the radius size you want, then you can draw different sizes of the circles as your need. Product name: Circular Drawing Tool Material: aluminum alloy Color: red Size: 164x 30 x 15mm/6.5 x 1.2 x 0.6 in Application: Woodworking, decoration, industrial drawing Package List:1x Circular Drawing Tool