Staedtler Mars Lumograph Pencil HB 100-HB. Lumograph pencils are designed for writing, drawing and sketching pencil on paper and matte drafting film. Lines reproduce well. Super-bonded lead is especially break-resistant. Pencil markings are easy to erase, and pencils are easy to sharpen. Each pencil has a blue hexagon barrel and no eraser. Wood from certified, sustainably managed forest.