Product name: Red 300mm Adjustable Drawing Circle Ruler,Aluminum Woodworking Compass Scriber Woodworking Scribe Gauge Adjustable Metric Arc Drawing Ruler Product size:Minimum circular radius: 36.5mm (1.43in); Maximum circular radius: 300mm (11.81in) Product color: Red Product material: Aluminum Product features: 1.The dimension of woodworking compass scriber woodworking scribe gauge adjustable metric Arc drawing ruler is 36.5 mm in minimum circle radius, and the maximum circle radius is 300 mm,the maximum circle radius of extended scribing circle ruler is 550mm,which can meet your various drawing needs. 2.This woodworking compass scriber is made of aluminum alloy material,It is corrosion resistant, rust resistant, CNC anodized red finish. This makes it last longer and more comfortable to use. 3.It has a unique design, and the woodworking compass marking machine scale uses professional laser printing, red background white, the mark is clear and easy to read, which makes it easy to draw various sizes of circles. 4.It is also very convenient to use, you only need to determine the center of the circle and insert the pen into the end hole that can draw the circle. You can adjust the radius of the circle as needed, which can meet various drawing needs and save you time. 5.This woodworking compass scriber woodworking scribe gauge adjustable metric Arc drawing ruler can be applied for woodworking use, decoration design, industrial drawing,DIY enthusiasts, engineers, carpenters, decorators or family use. Precautions: 1. As we know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pcs woodworking compass scriber woodworking scribe gauge adjustable metric Arc drawing ruler