Our angle measuring tool is made of high-quality aluminum alloy. The surface is sprayed with frosted texture and high-quality anti-corrosion paint. Also has strong wear resistance and corrosion resistance, durable and long service life. Perfect Size: Size: 18.5*18.5cm/7*7in (right angle). Thickness: 10mm/0.4in. And which is lightweight, small in size, very convenient to carry and store. More convenient to use, perfect for carrying and using it at work. Accurate measurement: O ring design makes the saw protractor angle find rotate 360 degrees. The miter saw protractor has single cut and bevel cut two scales. 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 to be converted into miter and bevel angles. Wide Application: This angle protractor has a precision laser engraving scale that ensures the dial is clear and easy to read, It is very suitable for both professionals and non-professionals. Suitable for crown molding, miter cuts, carpentry, plumbing, metalworking and more.