Ma muli o nā kūlana wili maoli, a i ʻole ka hana hewa ʻana o ka drill bit, hoʻokumu pinepine ʻia nā ʻano lole.

Inā ʻaʻole i hoʻokolokolo ʻia ma mua a wili hou ʻia ma mua o ka hiki ʻana mai o kona pōʻaiapili ʻaʻahu, e hana maikaʻi ʻole a hāʻule paha ka drill bit.

E hōʻoia i ka pili ʻole o ka bit drill (koe naʻe nā niho wili) me ka ʻili metala