Staedtler Mars Lumograph Charcoal Pencils - Hardness / Gradation - Hard - Lead Diameter - 4.5 MM is a high quality charcoal pencil with special lead formulation containing a high proportion of carbon and charcoal for a wide range of deepest black tones. Particularly suitable for blending and hatching as well as for expressive sketches and portraits. Wood from PEFC-certified, sustainably managed forests