Stainless Steel Woodworkers Edge Ruler Clamp 70 Degree Adjustable Protractor Angle Finder Scriber Gauge for Woodworking Carpentry Measuring ToolsFeature:Unparalleled Precision: Our latest precision scale can provide unparalleled panel layout working precision. Simply press your head at the desired angle and then press straight line. The head can be adjusted from 0 to 70 and clamped every 5 (plus 22-1/2 and 67-1/2) to ensure accurate reference angles and lengths respectively. There are three sizes available: 10 inches, 15 inches, or 20 inches. Both edges of the blade are laser engraved with an inch scale from 1/32 inch es, increments. The total cumulative scale error over the length of the blade is. 004 ". The thin satin-finished stainless steel blade is easy to read and minimizes parallax errors. The perfect tool for wood design: Even if you don't use angles, it's also a design tool. Almost all projects can be completed. The saw blade has the same special saw teeth. Design line notches have been found in our new precision stainless steel woodworking mesh. There is a notch every sixteen inches on the entire blade. Simply place the pencil in the cutout and move your head along the edge of the magazine to get a perfect parallel line. Specification:Material: Metal Color: Silver Size: 10 inch, 15 inch, 20 inch Measuring Range: 0-70 degree Measuring Accuracy: 1mm Type: Angle RulerNote: Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2mm measuring deviation due to manual measurement.1 X Angle Ruler