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Product information:

Color classification: Large spring [adjustable strength 7-70kg], small spring [adjustable strength 18-118kg], double-layer spring [adjustable strength 25-180kg]
Fitness effect: exercise arm muscles

Double spring design
Engineering handle
Wrist trainer
Detachable components
Odor-free material
Bold metal steel pipe

Packing list:

Arm force device*1

New Arm Strength Equipment Men's Wrist Grip Professional Muscle Training

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