Features: Accuracy engineered aluminum triangle ruler with integrated angles marking square ensures accurate 90° and 45° measurements, featuring strong anodized surfaces that resist scratches and erosion . The heavy duty metal construction maintains perfect geometry under pressure, combining scratch resistant graduations and double purpose edges for both measurement and precise line marking tasks. Ideal for professional carpenter, workshop technicians, and enthusiasts requiring stable dimensional accuracy in demanding projects. Perfect for layout tasks in construction site , woodworking shops, or home renovation projects where stable measurement tools are vital . clear metric/royal scales remain in low light conditions, while the lightweight yet rigid design enables effortless portability in tool belts or workshop drawers. Specifications: Component : metal Size: about 79x82x112mm/3.11x3.23x4.41inch Package Includes: 1 set Triangle Ruler note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.