These Jumbo Graphite Pencils with ultra-thick leads are the same high quality as the Castell 9000 Artists’ Pencil. Renowned for smooth sketching and rough drafting, they are also perfectly suited to large-scale shading and artistic projects. Packaged in a practical, highly transportable tin box, these Jumbo Graphite Pencils will follow artists wherever their creative impulses may lead.Technical specifications:Extra thick 5.3 mm leadAvailable in 5 hardness grades – HB, 2B, 4B, 6B and 8BGreater resistance to breakage due to SV bondingEnvironmentally safe water-based coatingSuitable for professional use