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Gripmaster Hand Exerciser StrengthenerFeatures :1. Unique eagle claw design, ergonomic independent buttons, exercise the strength of each finger.2. Made of ABS material, TPE soft rubber finger keys, to ensure the comfort of the fingers.3. High quality carbon steel spring with tension level up to 45 kg/99lbs, effectively exercise your hands.4. Support 5-finger training, 4-finger training and body training. It can also be used for injury recovery and stress relief.5. Can be carried with you, you can relieve stress at work. Perfect for rock climbers, guitarists or softball pitchers.