Charcoal pencils provide a consistent, even tone in varying grades of hardness, and are less prone to damage. Did you know that charcoal pencils are usually made from willow or vines? The sticks, which are long and thin, are one of the main media for uncompressed charcoal. The vine variety is dark grey, while willow charcoal is black. Willow charcoal is available in a range of widths, which may be indicated by names such as thin, medium, thick, and jumbo, ranging from about 0.11 to 0.94 inches (3 to 24 mm). Willow charcoal is used in classrooms, by professional artists, architects, and draftsmen and by painters for their preliminary canvas sketches. Charcoal pencils are found in H, HB, B, 2B, 3B, 4B, 5B, and 6B.