The Lyra Art Design Pencils are the perfect choice for graphics, design, fine art, and architecture. The extra-fine graphite leads are encased in pure cedarwood, making them highly durable. The Art Design Pencils are available in 17 grades from 6H to 9B, providing you with the variety you need for chiaroscuro contrasts. They meet the demands of professional shading techniques. AP certified and non-toxic.