... structure, user friendly, very comfortable while practice, avoid fatigue and pain of hand.B. The resistant levels could be adjusted freely, suitable ... be use for strengthen palm, finger, wrists and other area of hand. D. Should any of our items meet your satisfaction or you ... in you area, please do not hesitate to contact us!Specification:A. Resistance adjustable range: 4-7poundsB. Color: Red , BlueC. ...