The Fixpencil was invented in 1929 by Carl Schmid, a Geneva engineer, then was developed and marketed by Caran d’Ache, quickly becoming a success around the world. Originally produced in bakelite then entirely in metal, it was the first mechanical pencil with a clutch mechanism that allowed leads of different diameters to be used. The 3mm lead version of the classic Fixpencil. Matt-black aluminium barrel; removable metal pocket clip in traditional Caran d'Ache style; plastic push-button, in a choice of colours, with integral sharpener.