Gripster not only improves the strength of your fingers, forearms, and wrists; But also trains the flexibility of each finger in isolation. If you feel anxious and can't concentrate. The hand grip strength trainer can help you relieve daily stress and relieve emotions. Product detail: Size: 4.7x4.3 inch Weight: 48g Material: Silicone Grip strength trainer which isolates each finger to strength individually. When you need to use fingers that are not commonly used in daily life, you can use them to strengthen your fingers.
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