Caran d'Ache - Grafstone Pure Graphite Pencil - HB - Caran d'Ache has explored the deepest graphite mines to search out the infinite color variations of carbon. The result is the Graphite Line, an original concept dedicated to graphite that gives artists the opportunity to compose their own graphite range and explore all the shades of black. Caran d'Ache Grafstone Woodless pencils are pure graphite leads that can be adapted equally well to very large or very small formats. They are great for broad applications and when carefully sharpened, they can be used for very precise drawing.