Triangular scale on a dark background. Scale ruler used by architects for measuring and drawing on plans. Engineering equipment in an office. Construction tool for precise drafts. Royalty-free ...

Learn more about how to use a scale rule for model railroading. This tool comes in handy when measuring scale plans, changing scales, and more.

Close up, male hands using a triangular scale ruler, black pencil on white paper draw architectural drawings, models, scale 1:25.

T3 is designed in a way that a symmetrical triangle can be formed through using 3 of its individual triangular ruler, such design allows each T-ruler to carry 4 scales/graduations.

Los Angeles-based studio Ensso has designed an all-in-one fountain pen with scale ruler for architects and engineers. Launched on Kickstarter, the Escala pen has a long, triangular cap that ...