Product DescriptionThe Starrett 505 Prosite Protractor series has been expanded to include this new 505P-7 model. It is constructed from durable engineered plastic and is affordably priced. It eliminates errors, reduces waste, and provides perfect accuracy for miter cuts. Simply set your saw to the angle that you read on the protractor, and whether it is upside down or backwards, the reading will always be correct. The tool has two scales. The Miter Cut Arrow and Inner Scale indicate the exact miter saw setting for a precise miter joint every time. The Single Cut Arrow and outer scale indicate the exact miter saw setting for fitting a single piece to an angle. This guide is ideal for carpenters, plumbers, and all building trades that require the measuring and transferring of angles. This 7" model has narrow legs, making it easier to use in compact spaces. It also makes a valuable measuring tool for home use and do-it-yourselfers. It is a must-have for every miter saw user?s toolbox. The L.S. Starrett Company manufactures precision measuring tools, metrology, and testing equipment, and saw blade products. The company, founded in 1880, is headquartered in Athol, MA.From the ManufacturerThe 505 Prosite Protractor family has been expanded to include the new 505P-7. Constructed from durable engineered plastic and economically priced, the 505P-7 eliminates calculations, reduces errors and provides greater accuracy for miter cuts. Simply set your saw to the angle that you read on the protractor. Upside down or backwards, the reading is always correct. The easy-to-use tool has two scales. The Miter Cut Arrow and Inner Scale indicate the exact miter saw setting for an accurate miter joint every time. The Single Cut Arrow and outer scale indicate the exact miter saw setting for fitting a single piece to an angle. The ProSite Protractor saves time and reduces waste. Its ideal for carpenters, plumbers, and all building trades that require the measuring and transferring of angles. It's also invaluable for home use and do-it-yourselfers. It is the perfect and essential companion for every miter saw user.