1、Aluminum Alloy Construction: This woodworking triangle ruler is crafted from aluminum alloy, resistant to oxidation and rustproof. Each ruler is thick, high in hardness, and not easily breakable. 2、Accurate Scale: 7 inch imperial scale (18cm metric) triangle ruler with a black matte finish to prevent error. Etched markings with a universal rafter conversion table for clear conversions, offering high accuracy and readability. 3、Exquisite Design: Metal ruler is easy to hanging and store when not in use; smoothly and flat appearance of the ruler won't harm your hands during use. 4、Easy To Use: The flat base of the woodworking triangle ruler ensures seamless alignment with wood, effortlessly enabling the creation of accurate and proportional straight or angled lines with ease and accuracy. 5、Versatile: The triangle ruler can be used as an angle ruler, saw guide, woodworking compass, triangle ruler, and framing square. Ideal for woodworking projects.