12-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 * 7-inch version also * 12-inches long; 1-1/2 pounds; 1-year warranty * Ideal for carpenters, plumbers and all building trades * Saves time and reduces waste * Scale shows angle for a miter joint and single cut * Takes error-prone calculations out of miter cuts * Upside down or backwards, the reading is always correct