These are a variation of the chakra receiver, differing in size and design; not unlike them, however, the user is capable of channelling their chakra through it. During the Fourth Shinobi World War, Obito Uchiha employed these against Naruto Uzumaki and Killer B. He keeps them stored in another dimension, and can readily deploy them when desired. Upon retrieval, Obito can eject them with enough force to pierce rock, as well as the flesh of fully transformed tailed beasts. Also like the simpler chakra receiver, Obito can manifest chakra chains through them, with which he is capable of binding the powers of a tailed beast.