'Pillar' in the Bible

Now look, I have made you {today} as a fortified city and as an iron pillar and a bronze wall against all the land, against the kings of Judah, against its princes, against its priests, and against the people of the land.

Now the pillars, [the] height of one pillar [was] eighteen cubits, and a thread of twelve cubits surrounded it, and its thickness [was] four fingers, hollowed out.

And a capital upon it [was] bronze and the height of the one capital [was] five cubits, and latticework and pomegranates [were] on the capital on all sides, all [of] bronze. And like these [was] the second pillar with pomegranates.