Scale Ruler -Engineer K85 Helix

This Helix ruler is a stylish scale ruler suitable for architects. The Helix Engineers technical scale ruler has markings of 1:1, 1:10, 1:2, 1:20, 1:5, 1:50, 1:25, and 1:250. 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.