Arukh HaShulchan, Orach Chaim 301:32-40

Sugya Map

• Issue: Defining Tashmishai (implements) of a Kli—specifically, does the nartik (case/sheath) carry the status of the kli it protects?
• Nafka Mina: Whether a nartik is muktzeh as a bosis or kli she-melachto l'issur.
• Primary Sources: Shabbat 122b, Shulchan Aruch OC 301:29, Aruch HaShulchan 301:32-40.

Text Snapshot

• Aruch HaShulchan 301:35: "דכל דבר שהוא נרתיק של כלי, הרי הוא ככלי גמור, ודינו ככלי שמלאכתו לאיסור."
• Nuance: The Aruch HaShulchan (AHS) employs hekesh—treating the nartik not as an accessory (tefel), but as a distinct kli because its intrinsic melacha is the safeguarding of the primary instrument.

Readings

• Magen Avraham (301:42): Maintains that if the case is dedicated solely to a specific kli, it shares its status (batel).
• Aruch HaShulchan (ibid): Argues for a functionalist expansion: the nartik is a kli in its own right, irrespective of whether the primary kli is currently inside. It is kli she-melachto l'issur because its "work" is protective, not necessarily prohibited per se, but functionally limited.

Friction

• Kushya: If the nartik is a kli gamur, why is it not muktzeh machmat gufo?
• Terutz: The AHS posits that utility defines the kli. If the nartik serves a protective function for a kli, that protection is the melacha. Thus, it is not muktzeh (lacking utility) but kli she-melachto l'issur (possessing a specific, albeit restricted, utility).

Intertext

• Shulchan Aruch, OC 301:29: Codifies that nartikim of knives are muktzeh. The AHS harmonizes this by classifying them under the issur category, rather than absolute muktzeh.
• Mishnah Berurah 301:130: Generally aligns with the AHS but emphasizes the "designated use" (yichud) as the pivot for kli status.

Psak/Practice

The AHS allows moving a nartik for the "need of its place" (tzorech mekomo) or "need of the kli" (tzorech gufo). The practical heuristic: if the object’s primary identity is the containment of another kli, treat it as kli she-melachto l'issur.

Takeaway

The AHS shifts the focus from the object’s material to its telos (purpose). If an object functions as a guard, its "work" is shielding—making it a kli even in the absence of the primary instrument.