'Metalsmiths' in the Bible

Then he deported all Jerusalem and all the commanders and all the fighting men, 10,000 captives, and all the craftsmen and metalsmiths. Except for the poorest people of the land, no one remained.

The king of Babylon also brought captive into Babylon all 7,000 fighting men and 1,000 craftsmen and metalsmiths—all strong and fit for war.