Drawing pencils are essential tools for artists and students alike. They come in various grades, which indicate the hardness or softness of the lead. Hard pencils, like H and 2H, produce lighter lines, while soft pencils, such as B and 2B, create darker, richer marks. The choice of pencil depends on the desired effect and technique. Most drawing pencils are made of a mixture of graphite and clay, which determines their hardness. The outer casing is typically made of wood, although some are available in mechanical forms. Artists often use different grades to achieve shading, texture, and detail in their work.