The Cobble Crusher is an item from The Legend of Zelda: Breath of the Wild. It is a two-handed Goron sword with an base attack power of 15, though this can be increased by certain weapon bonuses. However it functions more akin to a hammer as since it cannot cut grass or trees but can destroy Ore Deposits and Weak Walls with a single hit. They can also break Barrels, and Pots, as well as metal and wooden crates. Thus this weapon can be consider a hammer-sword hybrid.
Some of the Goron guards at Goron City wield it as a one-handed sword. Lizalfos and Moblins can also carry them one-handed as well. It is the weakest out of the three Goron swords as it is weaker than the Stone Smasher which is the second strongest Goron sword. It has a base attack power of 15 which is greater than the Drillshaft, though is weaker in terms of durability. One spawns in Goron City next to the house south of the inn, and will respawn each time Link breaks it. Rohan requires one to reforge the Boulder Breaker to be used as a material in its reconstruction.