What is "ha'Petzirah Pim"?
Rashi: For people for whom it was too tedious to go to Eretz Pelishtim to sharpen Kelim, they had files. They had many mouths and spikes 1 to sharpen the plow Kelim. Malbim - it was not professional.
Radak: "Va'Yiftzar" (Bereishis 33:11) is [to coax with] many words and supplications. Pim is like Piyos (mouths).
What is "veli'Shlosh Kileshon"?
Rashi: It is a three-pronged pitchfork.
Radak citing Targum Yonasan: It is a Kli with three teeth that launderers use to stretch garments after they were laundered.
Why does Kardumin have the prefix Leha (Lamed and Hei)? It suffices to have La (Lamed with a Patach)!
Radak: On rare occasions, the prefix is Leha, and not La, e.g. "leha'Gedud", "leha'Am ha'Zeh" (Divrei ha'Yamim 2 25:10, 2:10:7).
What is "Lehatiziv ha'Darban"?
Rashi: It is to sharpen the Darban (a needle), to insert it in the stick of the plowshare. (The needle is used to sting the ox to make it plow.)
Radak: It is to arrange (affix) the Darban in the stick of the plowshare.
