The Empire Heavy Duty Magnum 12" Rafter is a high-quality aluminum square measuring tool designed for precision in both combination square and rafter square applications. Made from durable aluminum and stainless steel, this square features a standard measurement system (SAE) and a sleek silver color. With a length of 12 inches, this model (3990 / E250M) from Empire is a reliable and versatile tool for various measuring and layout tasks in the home and workshop. Built in the USA, this heavy-duty square is a durable and efficient tool for professionals and DIY enthusiasts alike.