Auto-Start NSD Rainbow Lit Spinner Gyro Ball ¨C Up to 15,000 RPM Premium hand strengthener and wrist exerciser for grip strength training, forearm workout, and pain relief; durable and portable

• Autostart with internal pre-tensioner, just roll back the rotor in the direction of the arrow on the rotor or against the internal resistance, when sufficient tension is achieved, just release and enjoy
• Computer balanced inner gyroscopic rotor for VIBRATION FREE operation at up to 15,000 RPM
• Purple Multi-LED Spinners lights up in various colors as speed increases
• Hard, impact resistant plastic shell that comes in an attractive PURPLE
• Small, compact exercise machine you can take ANYWHERE; Provides up to 24.3 lb-in of torque at 10,000 RPM