Power Wrist Gyro Ball AUTO Start Gyroscope Ball Wrist and Forearm Exerciser Arm Strengthener for Stronger Muscle and Bones (Blue+Counter)

Power Wrist Gyro Ball AUTO Start Gyroscope Ball Wrist and Forearm Exerciser Arm Strengthener for Stronger Muscle and Bones (Blue+Counter)

• Pump, hypertrophy, rehab, prehab and wrist/grip strength all in one: They’re great for rehab and prehab regarding wrist, grip and forearms, so all grip trainers should have one on standby
• Small, compact exercise machine you can take ANYWHERE
• AUTO START, NO STRING NEEDED! with internal pre-tensioner, incredible high speed up to 20,000 rotational speed per minute pass through testing
• Added counter keeps track of Current speed in RPM, Historical top speed in RPM and Physical strength index