Challenging Torque Ball-Metal Gyro Ball Wrist Exerciser with Metal Shell, Auto-Start Powerball Gyroscope for Strengthening Arms, Fingers & Wrist

• Auto-Start Design: Push metal core as arrow, gyro ball wrist exerciser starts with the internal spring and wrist motion. LED lights change with rotation, making it a magical torqueball that can bring you happiness, stress relief & good for health
• 5-Level Color-Shifting Challenge: The wrist ball’s core matches LED colors to wristball’s core speed: Blue, Green, Red, Purple, Cyan. The gyroscope wrist exerciser can train wrist strength, and bring you the joy of competitive challenges
• Excellent Quality£ºThe gyro ball wrist exerciser forearm strengthener features a full-metal shell, non-slip silicone grip, anti-slip wrist strap design. Powered purely by mechanical driving without electricity, it ensures stability, control, durability, & longevity
• Strengthen Wrists & Hands: The wrist gyro ball targets joints, ligaments, and muscles of the hands, wrists & forearms£¬perfect selection for office workers, students, tennis trainer£¬bowling ball exerciser and badminton trainer
• Portable & Versatile: The gyro ball metal with a moderate size and weight, and a convenient carrying case, you can easily exercise and relieve stress anytime, anywhere ¨C whether it’s in the office, gym, at home, or during travel