Promotes Hand Health & Recovery: The hand gripper strength trainer can help rehab a hand post-injury or post-surgery fingers become stronger,help the elder add repetitions to reap additional benefits with recovery of hand injuries,enhance the strength and flexibility3D Spiky Points Enhance Blood Circulation: This finger grip strength exerciser ball can promote your blood circulation,its a great hand exerciser for guitar player,pianist,people who often do typing,driving,writing,climbing jobs,perfect for stress relief,reduce pressure and anxiety4 Fingers Separated Anti-drop Design: Our hand stress reliever ball with ergonomic oval design,4 separated fingers,fixed and firmly can effectively prevent fingers contracture and deformation,will not fall due to inflexibility of the patient's fingersSafe & Comfortable Material: Our pressure & stress relief ball is made of high-quality TPR material,healthy and environment-friendly,3D high elastic tentacles,can be squeezed and pressed as often as possible,skin friendly, flexible,non-deforming after long-term usePortable & Easy to Wash: Our hand exerciser and finger strengthener tool is lightweight and small size,can be used either at home,gym or wherever you go,suitable for many occasions,such as school,office and so on,Easy to clean,no bad smell,a perfect gift for your friends or family