Features： 1、Through the use of wrist ball training, the muscles and flexibility of the forearm and wrist will continue to grow, and you can see significant improvements in muscle strength and flexibility. 2、Dual purpose disassembly is convenient. The silicone handle can be disassembled and changed for use at any time, and it has stuck hole design to make the wrist ball very firm, and the gyro ball will not loosen from your hand. 3、The wrist ball can exercise or recover the body according to the different speed. It is very suitable for sports enthusiasts, office crowds, school students and patients recovering from wrist injuries. 4、Wrist ball has a strong reaction at high speed. The faster the speed, the greater the strength and the greater the effect of exercise. It is suitable for training arms, wrists and fingers. 5、At lower speeds, the wrist ball can soothe muscles, restore sore and damaged limbs, or help reduce inflammation caused by arthritis, carpal tunnel syndrome, RSI, or tendinitis. Specification： Item Type: Handle Wrist Ball Material: ABS Specifications: Length Approx. 23cm / 9.05in For people: Sports Enthusiasts: Use wrist ball exercises to make it more tense and more powerful. Office Crowd: Exercise with wrist ball can keep away from sub-health or relieve the discomfort caused by mouse hands. Students in School: Promote bone development, enhance grip, wrist strength, arm strength, and finger flexibility. Wrist Injury: Use wrist ball exercises to speed up the flexibility of the hand after the injury is healed. Package List： 1 x Self Starting Wrist Ball with Handle