1)
What is "Mate Resha'im"?
1.
Rashi: It used to strike nations with anger (6).
2.
Malbim: It is taskmasters and officers who press the nation.
2)
What is "Shevet Moshelim"?
1.
Radak: "Shevet" is a metaphor for the strength and authority of Resha'im - Nebuchadnetzar, Evil Merudach and Belshatzar.
2.
Malbim: It is the ruler himself.