Reference for Kelim 16:2
הַסַּלִּים שֶׁל עֵץ, מִשֶּׁיַּחְסֹם וִיקַנֵּב. וְשֶׁל תְּמָרָה, אַף עַל פִּי שֶׁלֹּא קִנֵּב מִבִּפְנִים, טָמֵא, שֶׁכֵּן מְקַיְּמִין. כַּלְכָּלָה, מִשֶּׁיַּחְסֹם וִיקַנֵּב וְיִגְמֹר אֶת הַתְּלוֹיָה. בֵּית הַלְּגִינִין, וּבֵית הַכּוֹסוֹת, אַף עַל פִּי שֶׁלֹּא קִנֵּב מִבִּפְנִים, טָמֵא, שֶׁכֵּן מְקַיְּמִין:
Wooden baskets [become susceptible to impurity] as soon as he rounds their rims and smooths the edges. But those that are made of palm-branches [become susceptible to impurity] even though their ends were not smoothed off on the inside, since they leave them like this. A basket [of reed-grass becomes susceptible to impurity] as soon as he rounds its rims and smooths the edges, and finishes its hanger. A wicker basket for flasks or for cups [is susceptible to impurity] even if he did not smooth the rough ends on the inside, since they leave them like this.