Heavy duty speed square set made from extra thick aluminium for superior strength, yet incredibly lightweight. Ideal for quick and accurate measurement readings, with ultra clear laser etched markings and bright powder coating for easy visibility and rust prevention The Vaunt metric roofing squares come in 180mm 300mm, and is complete with common, hip and valley measurements protractor functionality. Use as a protractor, try square, mitre square, framing square or just for quick and easy 90 degree and 45 degree angles. 1 x 180mm Speed Square 1 x 300mm Speed Square Professional speed square set 180mm 300mm Clear laser etched markings Strong thick cast aluminium Wide base for stable alignment.