The wrist force strength trainer device is made of custom carbon steel spring, it does not rust and the elastic test does not deform nearly a million times.
Custom sponge handle. The bracelet is made of a custom-made scouring sponge that is non-slip, soft, comfortable and has strong sweat absorption.
High-density ecological belts. The bracelet is made of high-density eco-friendly straps, which is safe, comfortable, easy to wear, and can be adjusted in any position.
ABS engineering materials. The wrist force device is made of ABS engineering material, which is durable, pressure-resistant, and high safety.
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