The Staedtler Mars Lumograph pencil is a high quality drawing pencil with special lead formulation to create metallic lustre in a wide variety of grey tones. It is designed for writing, drawing and sketching, and hatch mark making on paper as well as matte drafting film. Each pencil has a blue hexagon barrel and super-bonded lead that is especially break-resistant. Pencils are easy to sharpen and their markings are easy to erase.