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 ...

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.

Launched on Kickstarter, the Escala pen has a long, triangular cap that doubles as a scale ruler graded with imperial and metric scales. Aimed at architects and engineers, who use pens and rulers ...