Scrap Metal
From MHWiki
Scrap Metal is dropped by Scavenger Mouse in the Catacombs and Forbidden Grove, Hydra Mouse in the Lagoon, and was available among the Birthday Gifts. It is used in crafting Obelisk of Incineration, Arcane Capturing Rod Of Never Yielding Mystery, and the Ship.
Currently, there is no way to purchase or trade scrap metal.
For some time, there used to be a cap of 24 pieces on the number of scrap metal hunters could hold in the inventory, but it has been removed.
Description
These jagged shards of scrap metal resemble the result of a steel mouse versus a drillbot.