Excellent material: the miter saw protractor tool is made of 6mm thick aluminum alloy which is strong and not easy to bend, has strong wear resistance and corrosion resistance, its size of 7.3 inches and lightweight material makes it easy to carry, the surface is held comfortably. Precise measurement: Miter Saw Angle Protractor provides two scales, single cut and miter cut. Miter cut to read the inside scale, plain cut to read the outside scale. No need to guess, make cutting work more precise and reduce material waste. Exquisite craftsmanship: O-ring design rotates the carpenter protractor finder 360 degrees, ensures the miter saw protractors fit the corner perfectly when measuring operation, accurate reading on inside or outside corners. The precision laser etched scale ensures the dial is clear and easy to read. Quick Reading: High-precision engraved dial applied with clear white markings, which create a sharp contrast against a black background, easy to read, and not easy to wear and blur, ensuring that you can read data at the fastest speed during the day. use and improve work efficiency. Wide Applications: The miter saw protractor guide can perform applications, such as measuring external angles, measuring internal angles and measuring height angles, it is suitable for saw protractor for woodworking, metalworking, simple miter, miter, crown-shaped, pipe and other woodworking applications. Precise correction Protractor may loosen due to friction during prolonged use , then secure it with the included hex wrench to maintain accurate measurements. 360 Degree Rotation O-ring design rotates the woodworker protractor finder 360 degrees, ensures the saw protractors miter saw perfectly fit the corner during measuring operation, accurate reading on inside or outside corners. Accurate measurement Mitre saw's Angle Measuring Protractor provides two scales: one cut simple and a miter cut , an external scale for measuring a single cut and an internal scale for measuring a miter cut.