Features: The woodworking scribing gauge is selected from aluminum alloy, Woodworking Compass is corrosion-resistant The extended Circles drawing tool makes your operating more convenient, is a good helper for your work. Circles marking tool radiuses is 36.5mm, and the Circles radiuses is 300mm,Circles radiuses of extended scribing Circles ruler is 550mm. Adjustable radiuses size, you can measure or draw different sizes of the circles as your need. The scale of woodworking compass Scriber is printed by professional, the markings are clear and easy to read with the white on the redness background,making it easy to draw circles of various sizes. All you have to do is to remove the screws, fix the woodworking compass, then adjust the radiuses size, You can adjust the radiuses of the Circles as needed to meet various drawing needs, so that you can save your time for consolidation and assembly. Specifications: Component:Aluminum Length:Approx.30cm/11.81inch Package Includes: 1Pc Compass Scriber note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.