These heavy duty canvas bags are filled with heavy material..
* Available in #3 weight sizes- 4 lbs, & 6 lbs. are Gravel. and the 10 lbs. are Steel Shots.
* By tossing and catching the bag, you can improve your grip strength, especially your finger power, for a penetrating grip. Simple, effective training!
* Note: there is an additional shipping cost due to weight of the iron palm Bags