‎Silicone

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SUITABLE FOR EVERYONE — The forearm strengthener is perfect for improving strength, power and speed in the wrists, fingers, and forearms. An undoubtedly best choice for Rock Climbers, Tennis Players, Athlete and Musicians to enhance the flexibility of fingers and wrists.
COMFORTABLE AND DURABLE — The ergonomic and soft handle of grip strength trainer is not only fit for small and large hands, seniors, and teens but also ensures comfortable holding. The resistance of hand grips for strength training is perfect for both men and women with different strength as it can be adjusted from 22 to 132lbs easily. You can use the FitBeast hand grip strengthener anywhere at any time.