Staedtler Mars Lumograph Drawing & Sketching Pencil ; Hardness / Gradation - 9B; Lead Diameter - 3.6 MM is high quality drawing pencil. High break-resistance through special lead formulation and super-bonded lead. Special lead formulation for results with a metallic lustre in a wide variety of grey tones. Particularly suitable for writing, drawing, sketching, and hatching as well as for professional graphic and artistic applications on paper and matt drawing film. Wood from PEFC-certified, sustainably managed forests