The Blue Spot Tools 300mm (12") metric rafter square is manufactured from aluminium with a reinforced frame, which makes it both durable and lightweight. Powder coated finish for added protection. Features clear metric markings for quick and precise reading. Includes scribe line notches for marking rip cuts and a pivot point, which makes marking out angles quick and easy. Ideal for use as a protractor, try square, framing square and for quick and easy 90º and 45º angles.