NEW Robert Baraban 4" Thunder Ball Get Crushing Finger and Grip Strength NOW
A new and unique way to work your fingers and test your grip strength
4 inch hollow steel ball
Smooth surface, nothing to grip...really tests finger strength.
Use a carabiner to attach the Thunder Ball to a pulley machine.
Or use a carabiner and chain to attach the Thunder Ball to a weight plate.
Tough Powder coated finish
Carabiner and chain NOT included
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