Features:

• 7-inch miter saw protractor with two scales--red "miter cut" scale and black "single cut" scale
• Allows direct transfer of the work angle to the miter saw in 3 steps with no calculations
• Durable 1/4-inch thick aluminum alloy; Teflon O-ring for smooth, precise operation
• 12-inch version also available to cover
• 7-inches long; 1-1/2 pounds; 1-year warranty

Editor Reviews:

Product Description:
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, the reading is always correct. Features 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. Patented.

Rating : - User Opinion
Starrett ProSite Protractor 505A-7
This is an excellent product. It provides an easy way to get an accurate angle measurement, it's handy, and small enough to be carried in your pocket!