The function of this stress reliever is to squeeze, roll, or press the ball to relieve tension and reduce stress. It's ideal for training finger flexibility against stiffness, rehabilitation exercises, hand muscle training, and strengthening hand muscles. Portable and lightweight, it's convenient to carry, allowing you to relax your hands anywhere, anytime. Suitable for rock climbers, bodybuilders, computer workers, badminton and table tennis enthusiasts, etc. Available in five different colors, each with slightly different firmness levels; specifically, it becomes firmer with increased firmness.
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