30cm clear Easi-Rule plastic ruler.

TechnoArt Broad Ruler

Helix Oxford Scale Rulers are the perfect addition to any stationery set.

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.

TechnoArt Ruler with folding hinge.

TechnoArt Triangular Scale Rulers are ideal for Plan Drawers, Architects, Workshop, Toolbox, Home Crafts, Hobbyists, Modellers, Draughtsman, Joiners, Cabinet Makers, Cardmaking , Graphic Designers.
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.