Aluminum Architect Triangular Hollow Drafting Scale

This ruler is marked with a range of calibrated scales (ratios) in Imperial inches for drawing and measuring from reduced scale drawings, such as blueprints and floor plans. It is made of anodized aluminum, hollow and light weight. This is a specialized ruler designed to facilitate the drafting and measuring of architectural drawings, such as floor plans and orthographic projections. It features multiple units of length and proportional length increments.Graduations include 3/32", 3/16", 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/2" and 3"