T-type woodworker Edge Rule Protractor 70 Degree Round Rotary Head 1mm Measuring Accuracy Scriber Gauge Tool Layout Angle Measurement Marking for Carpenter Feature: 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 (+22-1/2 and 67-1/2) to ensure you accurate reference angle and length respectively. Woodworking Edge Principle: The secret of TTKJ T-shaped ruler is a series of precision machined index and spring holes, Close tolerance indexing pins that mesh with them. The pin snaps into place, ensuring it is accurately placed. Both edges of the blade are laser engraved with an inch scale from 1/32 inch. Przyrost.Ca The 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 blade has the same special 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 Weight: About 300g, 320g, 350g 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 might be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement.1 x Carpenters Edge Rule