Gyroscopic Hand Exercise Balls

[Auto Start Power Wrist Ball]: Use for hand therapy ball,exercise ball,exercise balls,resistance tr..

Reduced pressure, powerful performance, adopts mechanical power design, self-starting device, and v..

Synthetic rubber construction Use a medicine ball for core and muscle strengthening, flexibility,..

[Auto Start Feature]: easy to start, no batteries required, start with your fingers, and the quicke..

Incredible grip-Powerballs generate up to 15kg of gyroscope resistance, which can quickly increase ..

[Eco-friendly materials]: Medicine Ball made of eco-friendly & odorless rubber, this medicine ball ..

Non bouncing, impact absorbing soft medicine balls Soft shell design is scuff resistance and desi..

Features：hand strengthener generates 0-16kg of inertial resistance, helping substantially increase ..

Exercise your fingers and arm strength,size of grip ball is small, just in hand, hold grip ball in ..

[Wrist Trainer ball]: a very popular toy to enhanced grip endurance, wrist arm and other best weapo..

[Metal core+PP material]: The interior is composed of a metal ball core and a PP material package. ..

[Auto Start Design]: Automatic start design of the gyro ball. Only needs to push the core in the di..