This meter angle finder is made of solid machined aluminum with a black anodized finish, which has great corrosion and wear resistance to last for years, and It feels so solid in your hand. The markings on miter saw protractor is laser engraved, so NO need to worry about the markings rubbing or wearing off, and white markings on black background are much easier to read, even without bright light. The miter saw protractor guide can perform applications, such as measuring external angles, measuring internal angles, and measuring height angles. This miter saw protractor rotates a full 360 degrees for measuring any odd angles, and It doesn't tell you the angle, it tells you where to set your saw; much less mental math and way easier than just an angle finder tool. It is suitable for saw protractor for woodworking, metalworking, miter single cut, miter cut, crown shaped, pipe, and other carpentry applications.