This unique new medium pimples rubber has amazing wobble effect and fantastic control, but also enables swift attacking play for the aggressive-offensive player.    DO Knuckle is highly recommended for players who desire a rubber that provides that characteristics of deceptive wobble effect pimples as well as speed for offensive play. It is also suitable to be used for defenders as a ‘defensive’ rubber. Used by Hitomi Sato and Honoka Hashimoto.