isomars Triangular Ruler  (Set of 1, White)

Isomars triangular scale(T4) is a stylish rule suitable for architects. Isomars 30 cm triangular scale is made of white plastic with precision divisions and has color coded sides of red and yellow-1:10,1:20,1:25,1:30,1:40,1:50,1:100,1:200,1:250,1:300,1:400,1:500 . Dimensions are in (cm) and (m) for easier working. 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.