Features: A thick aluminum body that supports heavy duty use. Clear scale, easy for you to read. A wider base that provides stable grip on materials. Embossed imperial graduations and common rafter conversion table. Tri-square, protractor, line scriber and saw guide all in one tool. Suitable for framing, roofing, building and remodeling projects. Also useful for hobbyists, home builders, manufacturers, DIYers & artists. Specification: Type: Straight Angle ruler Material: Aluminum alloy Color: Black Size:7"/12" Weight: 225g/541g Quantity: 1 Pc Measuring range: 0-30 Type(Optional): Metric,Inch,Inch/Metric .