Koh-I-Noor 1510 Natural Professional Graphite Pencils are premium artist quality pencils ideal for sketching, drawing, writing, arts, graphics, hatching, etc. Koh-I-Noor Hardtmuth was founded by Joseph Hardtmuth in 1790. Koh-I-Noor produced the first pencil leads by using a mixture of graphite and clay.Koh-I-Noor’s high quality Natural graphite pencils glide smoothly over the paper. These pencils have high opacity and are lightfast along with clean erasing qualities. The pencils are encased in California Cedar to help prevent breakage, especially when sharpening. Koh-I-Noor’s golden Natural artist pencil has been on the market since decades during which period it has won many awards around the world for its impressive quality.Koh-I-Noor Natural Artist Pencils come in 11 Grades from 2H to 8B (Extra Soft). Koh-I-Noor Natural Pencils have a 2 - 2.5 mm tick lead. The pencil itself is hexagonal in shape and is 7 mm thick. The pencils are pre-sharpened. Made by Koh-I-Noor in the Czech Republic (&Europe), these pencils are similar to Staedtler Lumograph, Sanford Turquoise and Berol Turquoise Pencils.Set Contents : 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB, F, H and 2H - Set of 12 1510 Natural Artist Professional Graphite Pencils(&Europe), these pencils are similar to Staedtler Lumograph, Sanford Turquoise and Berol Turquoise Pencils.Set Contents : 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB, F, H and 2H - Set of 12 1510 Natural Artist Professional Graphite Pencils