Unique patented design works grip, wrist and forearms
Shifting sand provides active resistance for stabilizing core muscles
Alternative to medicine balls, kettle bells, dumbbells, etc.
Safer and easier on people and floors than metal weights
Sold unfilled; simply fill with dry all-purpose sand

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 12 inch
Height : 0.8 inch
Length : 12 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 4 ounce (View shipping rates and policies)

ASIN : B006M6J6OM