Triangular Architectural Scale Ruler

This engineering triangle scale is made of anodized aluminum alloy, very solid and sturdy. Designed for maximum durability, this 3 sided metal architect ruler is perfect for lasting use. It is professional grade with supreme accuracy. With reliable construction and accurate performance, the black construction ruler is ideal for architects, engineers, draftsmen and students. All numbers and measurement markings on drafting scale rulers are laser etched for maximum clarity and readability.