Improve your wrist, grip, and arm strength
Harness this resistance at fast speeds to build serious arm, wrist, and grip strength.
It features a military-grade polycarbonate shell and a cord-start rotor (string activation).
– Automatic start design. Push the core in the direction of the arrow, and start with the internal spring, very easy and convenient.
– When it rotates, the cool-colored lights inside will light up. It can add fun while restoring muscle soreness.
– The convenient design can be carried anywhere, whether in the office, gym, or at home, it can be used as a toy to decompress at any time, and it can also exercise arm muscles.
– Wrist balls can promote blood circulation and increase the strength of fingers, wrists, hands, forearms, biceps, triceps and ligaments, and shoulders, and restore muscle strength.
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