'Threshing sledges' in the Bible

And Araunah said to David, Let my lord the king take and offer up that which is good in his sight: see, here are oxen for the burnt-offering, and the threshing-sledges and implements of the oxen for wood.

And Ornan said to David, Take it to thee, and let my lord the king do that which is good in his sight: see, I give the oxen for the burnt-offering, and the threshing-sledges for wood, and the wheat for the oblation; I give it all.