Accurate Measurement: The miter saw protractor angle finder provides two scales: single cut and miter cut, external scale to measure a single cut and internal scale to measure a miter cut, conversion table which allows values of the spring and corner angles being converted into mitre and bevel angles. Exquisite Craftsmanship: The O-ring design makes the saw protractor angle finderrotate full 360 degrees, ensures mitre saw protractors fit the corner smoothly when doing measuring operation, precise read on inside or outside corners. precision laser engraving scale ensure the dial is clear and easy to read. Excellent Material: The miter saw protractor tool is made of aluminum alloy, which has strong wear resistance and corrosion resistance, expand itself service life, 7inch size and lightweight material makes it easy to carry. 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, miter single cut, miter cut, crown shaped, pipe, and other carpentry applications.