Graphite pencils are writing and drawing tools that use a core made of a mixture of graphite and clay. The hardness or softness of the pencil is determined by the ratio of these materials, which is indicated by a grading scale. Pencils are commonly labeled with numbers and letters, such as HB, 2B, or 4H, to signify their hardness levels. These pencils are popular for their versatility and ease of use. They can create fine lines for detailed work or broader strokes for shading. Artists, students, and professionals often prefer graphite pencils for their ability to produce a range of tones and textures on paper.