Starrett 7" ProSite Protractor
* Takes error-prone calculations out of the process of miter cuts to ensure perfect miter joints every time. Simply set your miter saw to the angle that you read -- upside-down or backwards!
* Easy-to-use tool has two scales: red scale and arrow show the angle for a miter joint, while the black arrow and scale provide the angle to fit a single workpiece to an angle.
* Durable aluminum with Teflon™ O-ring for smooth and positive operation.