Royal Sovereign : Wolff's Carbon Pencils : 2B. Wolff's Carbon Pencils combine the best drawing attributes of graphite and charcoal without easy breakage and excessive smudging. This enables the artist to create effects from light shading and outlining to rough sketching and dark shading. The carbon pencil has a fine grain and applies smoothly and precisely in rich velvety matte black lines. Carbon pencils have a consistent softness for superior blending and texture. The 5mm core is encased within a natural cedar wood barrel making the pencils easy to use and easy to sharpen for detail work. This particular pencil comes in grade 2B.