Extremely pleased with the Faber Castell kneadable erasers. Very pliable. Can work into points to clean small areas. As you work it it cleans itself. Can use like a blotter to pick up excess colour. Can break or combine to make smaller or larger eraser depending on current need. Great for cleaning up charcoal or other messy media. Have previously purchased other brand which lacks these important properties. Highly recommend. Dr Cecilia Netolicky