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 doubles as ...

If you are searching for a compact ruler and pencil set to carry in your pocket or bag taking notes or sketching. The Titanium Triangular Ruler Pen is a prime example of such a tool, offering a blend ...