The General’s Kneadable Eraser #183E is soft and non-abrasive, they are great for erasing of graphite, dry pastel, or charcoal, and their slight tackiness makes them the ideal rub out tool to remove charcoal from your drawing and to lift out highlights.
To renew these putty-like eraser for a fresh erasing surface, knead it until the surface appears clean. Kneading also softens the eraser so you can create custom shapes for detail work and reductive drawing.
Kneaded erasers can be shaped for precision erasing and creating highlights in your drawings.