Description The aluminum triangular ruler is professional grade and offers the highest level of accuracy. Designed for maximum durability, this 3- sided metal architect' ruler is perfect for long- lasting use. With its reliable construction and precise performance, this architectural ruler is for architects, engineers, draftsmen and students. Feature - Material: Aluminum alloy. - Size: About 12. 77X0. 98X0. 79in/ 32. 50X2. 50X2. 00cm. - Color: Black. Including 1 x Architectural Scale Ruler Architectural Scale Ruler- Lightweight and portable, more convenient to store and carry around. Scale Ruler- The numbers are clear, which are easy to identify, and then you can read quickly and with great accuracy. Engineering Painting Ruler Tool- Specially designed for people who need to measure size or something. Application- Suitable for architecture, professional , civil engineering, painting, drafting, technical illustration, measurement, etc. Durable Engineering Painting Ruler- The triangular ruler used high- quality aluminum alloy material, durable and firm, suitable for measuring use.