Architectural Scale Ruler 3 Pack Aluminum Triangular Ruler 12 Inch Imperial Metal Scale Ruler for Blueprint Drafting Ruler for Architect, Civil Engineer, Draftsman

Premium Material: Engineer scale ruler is made of black aluminum oxide, well machined, durable and not easy to damage Laser Etching: The numbers and scales on the triangular scale are all laser etched, the numbers are clear, the proportions are accurate, and will never fade or rub off Inch scale: The scale ruler has 3 sides and 6 scales: 1:10, 1:20, 1:30, 1:40, 1:50, 1:60 Multiple Uses: Triangles are the first choice for blueprints, civil engineering, architectural drawings and technical illustrations Easy to carry: The metal scale ruler is light and you can carry it with you without taking too much space