Jamieson, Fausset and Brown on Zechariah 10:4

4. Out of him--Judah is to be no more subject to foreigners, but from itself shall come its rulers.

the corner--stone, Messiah (Is 28:16). "Corners" simply express governors (1Sa 14:38, Margin; Is 19:13, Margin). The Maccabees, Judah's governors and deliverers from Antiochus the oppressor, are primarily meant; but Messiah is the Antitype. Messiah supports and binds together the Church, Jews and Gentiles.

the nail--(Jud 4:21; Is 22:23). The large peg inside an Oriental tent, on which is hung most of its valuable furniture. On Messiah hang all the glory and hope of His people.

bow--(Zec 9:13). Judah shall not need foreign soldiery. Messiah shall be her battle-bow (Psa 45:4, 5; Re 6:2).

every oppressor--rather, in a good sense, ruler, as the kindred Ethiopic term means. So "exactor," in Is 60:17, namely, one who exacts the tribute from the nations made tributary to Judah [Ludovicus De Dieu].