Excellent Material: The miter saw gauge guide tool is made of aluminum alloy, the anodized surface is held comfortably. Single edge 0.2'' thickness, wear-resistant and corrosion-resistant, more durable than plastic, greatly extends the service life. Accurate Measuring: Measuring angle protractor has the functions of single cut and miter cut. Miter cut to read the inner scale, single cut to read the outer scale. No need to guess, make the cutting work more accurate and reduce materials waste. Fast to Read: High precision engraved dial applied with clear white markings, which create a sharp contrast on a black background, easy to read, and not easy to wear and blur, ensuring that you can read data at the fastest speed during use and improve work efficiency. Easy to Use: The "O"-shaped device inside the carpenter's construction miter angle tool can rotate 360 degrees smoothly, accurate angle perfectly fits the corner part, bonus hex wrench adjusts the tension. 7 inches is easy to carry and work anywhere. Wide Applications: The professional miter saw protractor can be used for external and internal angle measurement. It is suitable for woodworking, metalworking, bevel single cut, bevel cut, crown molding, and other woodworking applications.