Helix Architect’s Scale Ruler

This Helix ruler is a stylish scale ruler suitable for architects.The Helix architects technical scale ruler has marking of 1:1, 1:100, 1:20, 1:200, 1:5, 1:50, 1:1250, and 1:2500. Scale rulers are used by architects and engineers to calculate dimension in a blue print or building plan without the use of time-consuming and complicated math equations.The ruler would be ideal for use in the office or at home.