Starrett 505P-7 Miter Saw Protractor Laser engraved dial for accuracy Constructed from durable engineered plastic Direct read from the work to your miter saw with two easy to read scales Easy-to use tool has two laser engraved scales Miter cut scale transfers readings directly to the miter saw for miter joints Single cut scale transfers readings directly to the miter saw for butt joints Protractor saves time and reduces waste Made from durable 7&#034; hardened plastic