1.INSTRUCTIONS: Our hand therapy ball help user recover strength finger and forearm muscle , increase flexibility effectively relieve spasm finger, numb, promote blood circulation 2.CROWD: The finger exerciser ball suits for stroke patient office worker,elderly and people with autism 3.DESIGN: Ergonomic oval design,more suit for your palm Two-finger grips for non-slip.High elastic TPE material (environmental protectionand and tasteless ) The material of this product is a little hard, you will feel a little soreness in your palm after a few times of grip, which will further speed up the blood circulation in your hands. This is the theory of acupoint massage in Chinese medicine. If the design is too soft, the protrusions on it will not do anything. 4.ADD: Except using for disease recovery,everyone can just put them on hands,do fitness training and strengthen hands musle and it can relieve stress and anxiety