Features: -Equipped with a carbon steel spring, it provides up to 45kg/99lbs of tension for effortless rebound. -With 5 independent buttons at ergonomic distances, it can precisely train fingers and palms, enhance flexibility, endurance and grip strength, and improve the overall performance of your hands. -Made of ABS material with three layers of soft coating, smooth and soft, providing a comfortable grip and reducing finger fatigue. -Lightweight and compact design makes it easy to carry around for use at home, at work, or on the go. -Suitable for strength building, injury recovery, stress relief, grip muscle training. Specifications: Color: black Size: 12cm Strength range: 20-45kg .
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