DETAILS OF THE GRAFWOOD PENCIL Premium FSC certified cedar wood Hexagonal, casing, varnish matches the hardness degree Superior quality lead, hard to soft depending on the hardness degree Diameter ranges from 2.1 - 3.6 mm TECHNIQUES FOR USE Pointillism, hatching, writing, sketching, shading, blurring, technical and artistic design, mixed techniques 9B, 7B, 5B, 3B : Extra fine graphite pencils to allow uniform shading of large areas and a regular, intense stroke HB : Extra-fine graphite for hatching and superimposing 2H : Extra-fine pencil for intense, regular, fine and extra fine lines (technical drawing, scientific illustration, etc.) Swiss Made