inch imperial black [precision measuring tool] the triangular carpenter measuring range is 0-180mm, the triangular ruler is graduated on the front and back, the scale is clear and accurate, it can you provide accurate measurement results. [multiple measurement function] the triangular carpenter can not only measure the length, but also quickly determine the angle from 0 to 90 degrees. There is also a quick conversion table in front of the triangular ruler which can save your time and increase your productivity. [unique handmade design] the Carpenter triangle has hollow auxiliary graphic frames in the middle that you can use to quickly draw lines and graphics on the board, and the practical t-shaped fixed edges can be attached to the board, allowing you to easily cut horizontally or diagonally without having to move from side to side. Improves cutting precision. [high quality material] made of high quality aluminum alloy, high hardness, matte black paint, good workmanship, effectively prevent strong light reflection, not easy to rust and wear, not easy to break, strong and durable . The corners of the triangle are passive, so you don't have to worry about scratching your hand. [large purpose Group] carpenter triangle is suitable for joinery, frames, quantifiers, tags, liners, saw guides, brackets and edge trimming guides for furniture making and architectural models, ideal for all construction and renovation projects.