Prestige Quick Roofing Square Black Aluminium 180mm (Metric) The Faithfull Prestige Quick Roofing Square, also known as a layout or angle square, rafter square or speed square, is the go to product for many carpenters. It is designed to provide a quick and accurate way to mark out for many building projects and widely used when constructing roof rafters. It combines the functions of a combination, try and framing square and can be used to make basic measurements and as a saw guide for 45 and 90 cuts. It can be utilised as a protractor allowing the measurement of angles and pitches. This makes light and fast work of cutting wall shoulders (bird beaks) or rafter ends. Pre-etched points on the square also allows for easy marking on common size timbers. This heavy-duty version is manufactured from aluminium using computer numerical controlled (CNC) machines. The black anodised finish offers enhanced corrosion protection and the laser engraved scales give outstanding measurement accuracy