?Wide Range of Use?The grip training ball is suitable for office workers who need to type for a long time,patient who need rehabilitation training after injury. Suitable for children, adolescents, all ages, including the elderly. ?Use It Anywhere Anytime?This ball could easily fit it in your pocket and you can take it out to squeeze whenever. You can use it while walking, traveling, and phone calling etc. It can be taken to office, school, or any place that you want to for training. ?Ergonomic design?The hand grip strength trainer have a unique “egg” shaped. They are made of silicone gel with an ergonomic design and unique textured surface. ?Safe & Easy to Clean?The hand exercise balls are made of thermoplastic rubber (TPR) which is completely non-toxic. It can be squeezed and rubbed repeatedly and can be restored immediately. It may be dirty after playing for a long time, you only need to rinse with warm water and detergent. ?Build Up Your Hand Strength?The hand grip strengther balls can train arms and wrists, strengthen hand exercises, and relieve joint pain. Also help the injured do rehabilitation training, divert attention to change some bad habits and stress relief.