ʻO ke kila paʻakikī paʻakikī kiʻekiʻe ka mea kaulana i ka ʻoki ʻana i nā mea hana, make a me nā ʻoihana mold.ʻO ka hapa nui o ka huli ʻana a me ka wili ʻana he OK, akā inā pono ʻoe e loaʻa ka hopena maikaʻi o ka ʻili, pono ʻoe e wili.Akā no ke kila paʻakikī paʻakikī, maikaʻi ʻole ka hana a nā huila abrasive maʻamau.ʻAe, ʻo nā huila CBN ka huila wili maikaʻi loa a i ʻole huila hoʻokala no nā Steel Hardened.