| 摘要 |
An exercise device which provides tone and strength to the muscles and opposing muscles of the hand, wrist, and forearm. The device comprises a pair of spherical balls attached to the ends of a cylindrical bar. The spherical balls are pressed between a pair of grip handles which are detachably engaged together. The grip handles are able to rotate about the X, Y and Z axes of the spherical balls in essentially universal motion.
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