Ball and Chain

From Zelda - Wiki on Neoseeker

The Ball And Chain is one of the new items on this game. Link can destroy huge obstacles and enemies with it.

This item is primarily used in the Snow Peak Ruins mainly for bashing ice or any other problematic beasts that may stand in your path.;) After your finished with the dungeon it is used slightly more but never as much as the other weapons and gizmos in your inventory.