Features: Made by aluminum alloy, stuidy and won't bend. Features easy-to-read accurate scales. O-ring mechanism swivels during operation and ensures smooth & accurate read on inside/outside corners. Two scales transfer your work angle directly to the miter saws for an accurate Miter cut, and Single cut. Use inner scale reading to set miter saws settings for an accurate miter joint cut. Use outer scale to miter saws settings for fitting a single piece to angle. Perfect for crown molding, miter cuts, carpentry, plumbing, metalworking and more. Specifications: Material: aluminum alloy Item weight: 171g / 6ounce Item size: 185 * 63mm / 7.3 * 2.5in Package weight: 187g / 6.6ounce Package size: 188 * 70 * 20mm / 7.4 * 2.8 * 0.9in Packing List: 1 * Protractor 1 * User Manual