Reference for Kelim 29:8
שְׁיָרֵי חַרְחוּר מִלְּמַטָּן, שִׁבְעָה. יַד מַגְרֵפָה שֶׁל בַּעֲלֵי בָתִּים, בֵּית שַׁמַּאי אוֹמְרִים, שִׁבְעָה. בֵּית הִלֵּל אוֹמְרִים, שְׁמֹנָה. שֶׁל סַיָּדִין, בֵּית שַׁמַּאי אוֹמְרִים, תִּשְׁעָה. בֵּית הִלֵּל אוֹמְרִים, עֲשָׂרָה. יָתֵר מִכָּאן, אִם רָצָה לְקַיֵּם, טָמֵא. וְיַד מְשַׁמְּשֵׁי הָאוּר, כָּל שֶׁהוּא:
The remnant of the shaft of an ox-goad at its lower end is considered connected [to that end up to a length of] seven [handbreadths]. Regarding the shaft of a householders' [oven] rake, Beit Shammai say: [it is considered connected up to] seven [handbreadths]; and Beit Hillel say: eight. Regarding that [i.e. the shaft of a rake] of plasterers, Beit Shammai say: nine; Beit Hillel say: ten. Exceeding that, if one wants to retain [it at its length], it is [susceptible to being rendered] impure. The shafts of fire tools [are susceptible to being rendered impure] at any length.