'Blacksmiths' in the Bible

Then the king and Jehoiada gave it to those in charge of the labor on the Lord’s temple, who were hiring stonecutters and carpenters to renovate the Lord’s temple, also blacksmiths and coppersmiths to repair the Lord’s temple.

Next the Lord showed me four blacksmiths.

I asked, "What are these going to do?" He answered, "These horns are the ones that have scattered Judah so that there is no one to be seen. But the blacksmiths have come to terrify Judah's enemies and cut off the horns of the nations that have thrust themselves against the land of Judah in order to scatter its people."