Stainless Steel Woodworkers Edge Ruler Caliper 70 Degree Adjustable Protractor Angle Finder Scriber Gauge for Woodworking Carpentry Measuring Tools         Feature:         Unparalleled precision: Our latest precision scale can provide unparalleled precision for your panel layout work.         Just press the head to the desired angle, and then press the straight line.         The head can be adjusted from 0 to 70 and fixed every 5 (plus 22-1 / 2 and 67-1 / 2) to provide you with accurate reference angles and lengths respectively.         Three sizes are available: 10 inches, 15 inches or 20 inches.         Both edges of the blade are laser engraved with an inch scale of 1/32 inches, increments.         The total cumulative error of the scale over the blade length is .004".         The thin satin-finished stainless steel blade is easy to read and minimizes parallax errors.         The perfect layout tool for woodworking: Even if you don't use angles, this is also a layout tool. Almost all projects can be completed. The saw blade has the same special saw teeth.         Design line notches were found in our new stainless steel precision woodworking grid.         There is a notch every sixteen inches on the entire blade.         Just place the pencil in the notch and slide the head along the edge of the stock to get a perfect parallel line.                  Specification:         Material: Metal         Color: Silver         Size: 10 inches, 15 inches, 20 inches         Measuring range: 0-70 degrees         Measurement accuracy: 1mm         Type: Angle ruler                  Note:         Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you          Please allow 1-2mm measuring deviation due to manual measurement.                                                                 1 X Angle Ruler