Features: Versatile Triangle Ruler -- 12 inches triangle ruler can be used as a protractor saw guide, miter, line scriber marking 45-degree lines and square, finding roof pitch, framing square and a ruler, perfect for all building and remodeling projects. High Precise Measurement -- Double face embossed high clear and high precise metric and imperial scales on the rafter square for easy reading and ensure high accurate measurement. Further more, there is a common rafter conversion table on the ruler for clear conversion. High quality & Sturdy -- Thickened aluminum alloy ruler with high strength and high hardness, anti-bending anti-drop, designed for long term service. Premium Quality -- Constructed of fine aluminum alloy with matte finish to prevent glare, corrosion resistance, oxidation resistance. Scope of Application -- 430x305x305mm / 16.9x12.0x12.0in suitable for all building and remodeling projects, also DIY enthusiast, home builders, manufacturers and artists. Color: Black Material: Aluminum Alloy Unite: Inch + Metric Size: 7in170mm, 12in300mm optional Features: Corrosion Resistance, Oxidation Resistance, High Hardness, High quality Side Length: 260 x 185 x 185mm / 10.2 x 7.3 x 7.3in 7in 430 x 305 x 305mm / 16.9 x 12.0 x 12.0 12in Item Weight: 195g/6.9oz 7in 438g/15.4oz 12in Packing List: 1 x Triangle Ruler Package List: 1 x Triangle Ruler