The Faithfull Quick Roofing Square* also known as a layout or angle square is designed to provide carpenters with a quick and accurate way to mark out for many building projects and is widely used when constructing roof rafters. The square is manufactured from aluminium and has imperial graduations marked with degree measurements, which helps to simplify material layout and timber cutting. Quick, accurate and able to calculate hips, valleys and angles on roofs making it a truly flexible square. Size: 7in *imperial measurements only Description: Quick & Easy Aluminium Roofing Square Size: 7in (imperial only)