These graphite pencils come in different grades of hardness. The softer the pencil, the darker the shade will be. Softer grades are ideal for sketching and drawing, while the harder grades are ideal to use for more detailed work like graphic drawings. This set of 12 graphite pencils is a great basic to have in your pencil collection. The different grades of hardness allow you to easily create sharp and soft lines in your drawings and sketches.