These erasers are great for working with charcoal and pastel. A small part of the eraser can be torn off and worked between the fingers to a point. The point tcan then be used to pull off or lighten the drawing. A full drawing can be created by removing rather than adding graphite, charcoal or pigment. When finished with the torn off part of the eraser, you can reuse it by kneading it into a new shape.