Zechariah 1:20

“And the Lord showed me four carpenters.] To saw and cut in pieces the four horns; or rather “four blacksmiths”f23; these horns were horns of iron; so the word is rendered a “smith” in (<091319>1 Samuel 13:19) and indeed it signifies both a worker in wood and a worker in iron; and who are sometimes distinguished by what they work in, whether wood or iron; (see <234412>Isaiah 44:12,13). The Jews sayf24 these four carpenters are Messiah ben David, Messiah ben Ephraim, Elijah, and the priest of righteousness; or, as elsewheref25, Elijah, the King Messiah, Melchizedek, and he that was anointed for war; though Kimchi much better interprets them of the kings, the princes above, who preside over…”

“four carpenters--or "artificers." The several instrumentalities employed, or to be employed, in crushing the "Gentile" powers which "scattered" Judah, are hereby referred to. For every one of the four horns there was a cleaving "artificer" to beat it down. For every enemy of God's people, God has provided a counteracting power adequate to destroy it.”

“1:20 The word translated blacksmiths could refer to any sort of craftsmen (mason, carpenter, smith). If the horns representing the nations were metal (see 1 Kgs 22:11), then blacksmiths were appropriate to the task of destroying them (see 2 Chr 24:12; Isa 44:12).”

“four: Zac 9:12-16, Zac 10:3-5, Zac 12:2-6; Deu 33:25; Jdg 11:16, Jdg 11:18; Sa1 12:11; Neh 9:27; Isa 54:15-17; Oba 1:21; Mic 5:5, Mic 5:6, Mic 5:8, Mic 5:9 Zechariah 1:21”