Staedtler Mars aluminium ruler is perfect for technical drawing in schools and offices. This ruler is lightweight and features a rubber strip underneath, making it non-slip. A hole at the end of the ruler allows you to hang it. It features clear graduations from 0 to 30 centimetres.
The Ruler edge is raised from the drawing surface, allowing the ink to apply cleanly. If that edge were flat on the paper, the ink would bleed between the edge of the paper, making an ugly mess.
