This is a precision square from Starrett, with a 12" blade and a 7-1/2" base. It is made of wood and has a graduation style of inches. The square is ideal for use in metalworking inspection and measurement, and is a must-have for anyone in the CNC, metalworking, and manufacturing industry. The brand is Starrett, which is known for its high-quality tools and precision equipment. This square will be a valuable addition to any tool collection and is sure to provide accurate measurements for years to come.