These donut erasers have interchangeable parts that can be removed and reassembled. They come in six colors and are available in "vanilla" and "chocolate" versions.
— In summer 2010, nine of 38 specialty retailers told TDmonthly that Japanese erasers are a top-selling collectible item. Nancy Hanson of The Toy Box in Friday Harbor, Wash., cited sales of four to five Iwako erasers each day.