These Lumograph Leads are the same high-quality, 2mm graphite leads found in Mars Lumograph pencils. They are strong, durable and an essential tool for clean and clear drafting, drawing, and writing.
The leads work smoothly especially over paper and vellum and the graphite is easily erasable. Graded leads are available in a range of degrees from hard (4H) to soft (4B).
Leads come in packs of two, contained in hard tubes