'Iron' in the Bible

He also brought out the people who [were] in it and put them to the saws and to the iron picks and to the iron axes, and he sent them to the place of the brickmakers. Thus he used to do to all the cities of the {Ammonites}, and he and all of the army returned to Jerusalem.

And if a man wants to touch them, he must use an iron instrument or the shaft of a spear; then they [are] consumed entirely with fire on the spot."