7 inch imperial black [precision measuring tool] triangular carpenter measuring range is 0-180mm, the triangular ruler is graduated on the front and back, l The scale is clear and precise, it can provide you with accurate measurement results. [multiple measurement function] the triangle 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 which you can use to quickly draw lines and graphics on the board, and the convenient t-shaped fixed edges can be attached to the board, allowing you to easily cut horizontally or diagonally without having to move left and right . 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. Triangle corners are passive, so you don't have to worry about scratching your hand. [large purpose Group] carpenter triangle is suitable for joinery, frames, quantifiers, labels, liners, saw guides, supports and edge cutting guides for furniture making and architectural models, ideal for any construction and renovation project.