AllAround Sports Wrist and Forearm Strengthener Work your Adduction and Abduction movements, flexor and extender muscles and Pronation and Supination movements Makes the clich "it's all in the wrist" far more accurate than you may have thought. Work all 6 motions of your wrist to experience fast, effective results. Devoted to increasing the strength, endurance and agility of the hand, wrist and forearm Will never break or wear out and is waranteed by the manufacturer for life!