FIXPENCIL 3MM : Often sought after, rarely found. Mechanical pencil with a lead of 3mm and a sharpener incorporated in the pushbutton. Favored by artists and caricaturists across the country. The beautiful, soft 3mm leads (3B and 6B) are available here. In the late 1920s, Caran d'Ache introduced one of the first mechanical pencils, the Fixpencil. It's still going strong, as one of the most respected clutch pencils on the market. Like the company itself, the Fixpencil has evolved.