This listing is for an NSD Power® Ball Gyroscopic Wrist Exerciser (100Hz model). It’s the ultimate handheld strength trainer, designed to improve grip, forearm, and wrist strength using a high-speed gyroscope mechanism. Brand: NSD Power® Model: Power Ball – 100Hz Gyroscope Portable, no power required – self-powered by manual rotation Great for athletes, musicians, and rehabilitation exercises Item is sold as pictured, in good used condition. Worldwide shipping available via eBay's Global Shipping Programme.
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