Triangular Scale - 7 Divisions Isomars 30cm

Triangular Scale 1:10, 1:15, 1:20, 1:25, 1:33½, 1:50, 1:100, 300mm / 30 cm / 12 inch Plastic ( ABS)* White Precision Devisions Packing Individually in PP Plastic Box 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. Ideal for Plan Drawers, Architects, Workshop, Toolbox, Home Crafts, Hobbyists, Modellers, Draughtsman, Joiners, Cabinet Makers, Cardmaking , Graphic Designers. Length: 30cm