Autostart Wristball GYRO Ball Reduce Pressure Finger Grip Wrist Exercise Grip Ball Decompression Gyroscopic Powerball Hand Exerciser

Specifications: Brand: Unbranded Color: Black, Silver&Black, Silver&Red, Silver&Blue Material: Alloys, Silica, Polycarbonate Size: 77mm(Diameter) Weight: 270g Features: 1. Feel the force of the wrist rotating with the rotary axis, effectively exercising the wrist. 2. No need for power, the centrifugal force generated by the internal rotation of high-speed rotation 3. Preferred alloy material, metal ball centre, sturdy and beautiful 4. Decompression, exercise, entertainment, a variety of uses 5. Built-in self-starting device, a push a put, can start 6. Wear a special wrist strap to prevent it from flying off too fast.