He mīkini kūikawā no ka wili ʻana i ke kokoleka a me kāna hui ʻana.Ma o ka hopena a me ka friction ma waena o ka mea a me ka pōpō kila i loko o ka pahu kuʻekuʻe, ua hoʻopili maikaʻi ʻia ka mea i ka fineness i makemake ʻia.