Another question can you use a hand held egg slicer on Shabbath?
Answer:
It is permitted to use an egg slicer on Shabbos (Shemiras Shabbos Ke-hilchata Ch. 6, note 12). Although the Mishnah Berurah is stringent concerning a cleaver, Rav Shlomo Zalman explains:
“It is not comparable to a cleaver… because [a cleaver] is not a keli se’uda; rather it is designated for techina. Alternatively, it is a utensil that store-owners are accustomed to use for their labor, and therefore it is forbidden because of uvdin de-chol. None of this is true of an egg slicer, which is composed of a number of normal blades, so that it is like any keli se’uda. According to this, it is possible that it is permissible to use this utensil also to cut a tomato, even though it is has the status of giddulei karka.”
Rav Moshe Feinstein (Orach Chaim 4: 74, Tochen 4) allows using a similar device for another reason, explaining that “this is only cutting into pieces, not dak-dak (tiny pieces).”
Best wishes.
