Experience the exquisitely smooth flow of fine graphite from the Cumberland Valley in England. Derwent's Graphic Pencils are made from the finest quality graphite and purest clays for a smooth line. They are ideal for crisp, detailed illustrations or tone drawings.Derwent Graphic Pencils are available in a full range of densities from 9B (softest) to 9H (hardest). Pencils in most of the range have 2.2mm graphite cores, but the softer pencils from 4B to 9B have thicker 3.5mm cores. The matte finish hexagonal shaft affords a firm grip. Pencils are pre-sharpened.