Auto-Star Wrist Power Gyroscopic Ball,Self-Starting Wrist Strength Ball,Wrist Strengthener and Forearm Exerciser for Stronger Arm Fingers Wrist Bones and Muscle

No electrical mechanical power required The alloy material is strong and durable Self-starting device controllable force Decompression fitness entertainment About this item 【Self-starting and Easy to Use】Built-in automatic bouncing device, one push and release, you can easily start, the strength is free to grasp. 【Wrist and Forearm Exerciser】Wrist force ball can be a good exercise for your forearm and wrist joints, help to build strong functional wrist and forearm, much better than holding tight squeeze. 【Wrist Cord Protection, Safe and Convenient】Please wear a special wrist cord when playing to prevent excessive force and throw out; Hand grip is moderate in size and easy to carry. You can use the wrist strength ball in a variety of occasions such as watching TV, walking, traveling, arm exercise, wrist recovery, etc. 【Well Made】Sturdy exterior, rubber handle, metal ball core, non-slip silicone edge for safer play; Size: 2.75 inch*2.75 inch*2.16 inch. 【Suitable for People】Sports enthusiasts – through the wrist ball exercise to make it more tension and more powerful; Office workers – through the wrist ball exercise can be away from sub-health or ease the discomfort brought by the mouse hand; Students-to promote bone development, enhance grip strength, wrist strength, arm strength and finger flexibility; Wrist injuries – through the wrist ball exercise to speed up the flexibility of the healing hand injury.