'Threshing sledges' in the Bible

Araunah told David, "My lord the king may take whatever he wishes and offer it. Look! Here are oxen for burnt offerings, and threshing sledges and harnesses for wood.

Ornan told David, "You can have it! My master, the king, may do what he wants. Look, I am giving you the oxen for burnt sacrifices, the threshing sledges for wood, and the wheat for an offering. I give it all to you."

This is what the Lord says: "Because Damascus has committed three crimes -- make that four! -- I will not revoke my decree of judgment. They ripped through Gilead like threshing sledges with iron teeth.