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Rotate clockwise to increase resistance. Counterclockwise to decrease resistance. Easy to adjust spring tension from 11LB to 132LB to adjust to a wide range of fitness levels. 2 pack hand gripper workout kit can help you exercise to train your two hands at the same time. Help to record your exerciser number every time when you use it. The handle is rubber non-slip, which is relatively soft and won't hurt fingers. Rotate the bottom to clear the data and reuse it.






