A new and unique way to work your fingers and test your grip strength. Use a carabiner to attach the Thunder Ball to a pulley machine. Or use a carabiner and chain to attach the Grip Ball to a weight plate.
- 4.5" inch solid steel ball with a tough powder coated finish
- Smooth surface, nothing to grip...really tests finger strength.
- Use a carabiner to attach the Grip Ball to a pulley machine.
- Or use a carabiner and chain to attach the Grip Ball to a weight plate.
- approx weight : 10lbs
|Warranty | General:||No|