Faber-Castell Pitt Graphite Crayons are made of graphite and clay and are great for sketching, shading and design work. You can use the full length of their octagonal 12mm x 120mm barrel to lay down highly lightfast, ageing-resistant colour, adding different effects depending on the pressure used and the degree of hardness you choose. You will find that Faber-Castell Pitt Graphite Crayons are long-lasting and very economical.