A graphite pencil is a writing and drawing tool that consists of a thin rod of graphite encased in wood or plastic. The core, made of a mixture of graphite and clay, allows for different levels of hardness, which affects the darkness and smoothness of the marks it makes. Graphite pencils are commonly used in schools, art, and professional settings due to their versatility and ease of use. The hardness of a graphite pencil is indicated by a grading system, ranging from H for hard to B for black, with F representing fine point. The most common type is the #2 pencil, often used for standardized tests and general writing. Graphite pencils are favored for their ability to be easily erased and sharpened, making them practical for various tasks.