Description If you are an architectural designer then you must not miss our architectural scale ruler. Made of a luminum alloy material it is high-quality and durable. Easy to operate and use it is suitable for professional and personal use. Feature - Material: Aluminum alloy. - Size: Approx. 32.50X2.50X2.00cm/ 12.77X0.98X0.79in. - The aluminum alloy ruler is solid and durable which is not easy to rust and deform. - It has no flex or wrapping which lies perfectly flat on the drawing surface. - Suitable for professional applications architecture civil engineering drafting and technical illustration. - 3-sided triangle scale ruler the concave base reduces smearing when drawing. - Easy to use accurate measurement numbers are clear and easy to identify.