●12inch Triangular Architect Scale Designed To Facilitate The Drafting And Measuring Of Architectural Drawings, Such As Floor Plans, Blue Prints, And Orthographic Projections ●12inch Triangular Architect Scale Designed To Facilitate The Drafting And Measuring Of Architectural Drawings, Such As Floor Plans, Blue Prints, And Orthographic Projections ●Triangular Ruler Made From High Impact Aluminum, Build To Last ●Architect Ruler With Durable Laser Cut Imperial Prints For Accuracy. They Will Not Wipe Or Scratch Off Ever ●Color Coded Triangular Scale For Easy And Quick Selection Of The Desired Scale