Reference for Kelim 13:8
מַסְרֵק שֶׁל פִּשְׁתָּן שֶׁנִּטְּלוּ שִׁנָּיו וְנִשְׁתַּיֵּר בּוֹ שְׁתַּיִם, טָמֵא. וְאַחַת, טָהוֹר. וְכֻלָּן, אַחַת אַחַת בִּפְנֵי עַצְמָן, טְמֵאוֹת. וְשֶׁל צֶמֶר שֶׁנִּטְּלוּ שִׁנָּיו אַחַת מִבֵּינְתַיִם, טָהוֹר. נִשְׁתַּיֵּר בּוֹ שָׁלֹשׁ בְּמָקוֹם אֶחָד, טָמֵא. הָיְתָה הַחִיצוֹנָה אַחַת מֵהֶן, טָהוֹר. נִטְּלוּ מִמֶּנּוּ שְׁתַּיִם וַעֲשָׂאָן לְמַלְקֶטֶת, טְמֵאוֹת. אַחַת וְהִתְקִינָהּ לְנֵר אוֹ לְמִתּוּחַ, טְמֵאָה:
A flax-comb whose teeth were removed but two remained is still susceptible to impurity. If only one [remained] it is pure. As regards all the teeth, each one individually is susceptible to impurity. A wool-comb: if one tooth out of every two was removed it is pure. If three consecutive teeth remained, it is susceptible to impurity. If the outermost tooth was one of them, [the comb] is pure. If two teeth were removed from the comb and made into a pair of tweezers, they are susceptible to impurity. Even if one [was removed] but it was fixed it to be used for a lamp or as a stretching-pin, it is susceptible to impurity.