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.   Durable & 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. Specification: Color: Black Material: Aluminum Alloy Unite: Inch + Metric Size: 7in(170mm), 12in(300mm)  (optional) Features: Corrosion Resistance, Oxidation Resistance, High Hardness, Durable Side Length: 260 * 185 * 185mm / 10.2 * 7.3 * 7.3in (7in)                      430 * 305 * 305mm / 16.9 * 12.0 * 12.0 (12in) Item Weight:  195g/6.9oz (7in)                        438g/15.4oz (12in) Packing List: 1 * Triangle Ruler