'Sledge' in the Bible

“His underparts are like sharp potsherds;He spreads out like a threshing sledge on the mire.

For dill is not threshed with a threshing sledge,Nor is the cartwheel driven over cummin;But dill is beaten out with a rod, and cummin with a club.

“Behold, I have made you a new, sharp threshing sledge with double edges;You will thresh the mountains and pulverize them,And will make the hills like chaff.