What are "pruning hooks" and "plowshares" in Micah 4:3?

Micah 4:3 says,

“And he shall judge among many people, and rebuke strong nations afar off; and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up a sword against nation, neither shall they learn war any more.” 

Micah 4:1 - 13

NASB - ¹ And it will come about in the last days That the mountain of the house of the LORD Will be established as the chief of the mountains It will be raised above the hills, And the peoples will stream to it. ² Many nations will come and say, "Come and let us go up to the mountain of the LORD And to the house of the God of Jacob, That He may teach us about His ways And that we may walk in His paths " For from Zion will go forth the law, Even the word of the LORD from Jerusalem.

Clarify • Share • Report • Asked 4 hours ago • Anonymous