This vintage measuring tool features a 12-inch tempered steel square blade with inch graduation style. The ruler was manufactured in the United States by Brown & Sharpe, a reputable brand in the metalworking inspection and measurement industry. The rigid rule type makes it a reliable tool for precision measurements. The item is ideal for those in the CNC, metalworking, and manufacturing industries, as well as for general business and industrial use. This item is a great addition to any collection, and its quality and durability make it a valuable tool for any workshop.