Daniel 7 writes about 4 beasts Who or what do you think they are?

Danie7 writes about 4 beast . Bear, leopard and a loin. And the 4th beast has teeth of iron. Hosea writes about 3 of the same beasts bear,leopard and a lion. Now to the forth beast with teeth of iron. Isaiah 41:15 talks about making a threshing sledge. The threshing sledge at this time was made of iron and had teeth. a threshing sledge is used for harvesting crops.