Aluminum Alloy SquareThe carpenter square is manufactured of high quality aluminum alloy with black matte finish to prevent glare, corrosion resistant and durable, not easy to break.The triangle metric ruler can be used as a protractor,miter, line scriber, saw guide and tri/meter square, framing square and a ruler, ideal for all building and remodeling projects. Two MeasurementsThe carpentry scribing tool features metric and imperial measurements with clear graduation, embossed imperial graduations and common rafter conversion table, the triangle ruler squares is convenient for measuring and read. High PrecisionIts thick edge can be used directly with the saw against the square for cross cuts or angled cuts using the etched protractor scale, let you quickly and accurately mark your cut lines on your stringers.The rafter square has scales for cutting hip, valley and jack rafters. Widely ApplicationL:300x300x420mm/12.0x12.0x16.5inch,S:180x180x250mm/7.09x7.09x9.8inch,Theengineers square is suitable for all building and remodeling projects, also hobbyists, home builders, manufacturers and artists. Multi-function The triangle ruler can be used as a protractor, line scriber, saw guide and trimeter square, framing square and a ruler, suitable for all woodworking projects.