Koh-I-Noor® the only manufacturer of technical pens in the United States and the industry leader, sets the standard for precision craftsmanship and design. The best of Rapidograph technology in one technical pen for all drafting and graphic arts applications. The Koh-I-Noor Rapidograph is a remarkably versatile technical pen. It handles like a pencil, moving in all directions without snagging or digging into the drawing surface. These pens have stainless steel drawing points and refillable see through ink cartridges that can be used on drafting film, vellum or tracing paper.
These are my personal pens of choice. | 
