This classic desk accessory is art-in-motion.
Exemplifies Newton''s principle that, ''action and reaction are equal and opposite.''
Use it to relieve stress, tune out boring coworkers, or to school youngsters in physics!
Lift one of the 5 steel balls at either end and let it swing back.
Fair warning: it''s totally addictive and clacking noise is very satisfying to hear

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 7.3 inch
Height : 5 inch
Length : 7.6 inch

Item Weight: 1.9 pounds (View shipping rates and policies)
Shipping Weight: 1.9 pounds (View shipping rates and policies)

ASIN : B01J8JRKBA