Description item :
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Automatic start (no cords required), just wind rotor backward 3 turns, release and spin for instant, fuss free starts every time
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Drop resistant and computer balanced to exceed 18000rpm spin speeds with zero vibration powered just by your wrist (see video)
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Hand strengthener generates 0-16kg of inertial resistance, helping substantially increase forearm muscle size, wrist and grip strength - includes multi-function LCD speed meter
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Highly beneficial grip strength trainer for golf, tennis, climbing, cycling, basketball, cricket, martial arts and with improved playing performance for pianists, drummers & guitarists
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Efficiently rehabilitates wrist pain, humerus fracture, scaphoid fracture, radial head fracture, numbness in fingers, numb hands, fractured wrist, elbow tendonitis, broken bones, olecranon bursitis
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