ʻO nā mīkini wili wili metala makamae he mau ʻāpana ia e hana ʻia ai ke kaʻina hana metala. I loko o kēia kaʻina hana, hoʻoili ʻia nā mea metala like ʻole ma o nā ʻōwili ʻelua, a i ʻole nā ​​​​lako lawelawe mea. Hoʻokaʻawale ʻia ka huaʻōlelo "wili" e ka mahana e wili ʻia ai ka metala. Hana nā wili wili gula ma ka hoʻohana ʻana i nā wili he nui e hoʻoponopono i nā waiwai kino o ka pepa metala. I ka hana ʻana i nā pepa gula, hāʻawi lākou i kahi mānoanoa like a me ke kūlike no ka pepa metala gula kālā keleawe a lākou e hoʻohana ai. Loaʻa i nā mīkini gula nā wili e ʻomi a hoʻopaʻa i ka pepa metala i kona hele ʻana ma o lākou.

Hāʻawi ʻo Hasung i nā ʻano mīkini wili hao like ʻole, e like me ka mīkini wili uea gula, ka mīkini wili uea a me ka pepa, ka mīkini wili uila a me nā wili wili mea hoʻonani a pēlā aku. ʻO nā wili wili uea he mau ʻāpana kahi e hoʻokomo ʻia ai nā uea nui ma o nā wili ʻelua me nā lua. Hiki ke hoʻopilikino ʻia nā nui uea e like me nā koi. Nā mīkini huki uea me nā make he nui ma ka hoʻemi ʻana i nā nui uea hoʻokahi i ka manawa. Mai ka uea 8mm kiʻekiʻe a hiki i ka 0.005mm liʻiliʻi a i ʻole ka liʻiliʻi.

Ma ke ʻano he hoʻokahi o nā mea hana mīkini ʻōwili metala makamae ʻoihana, ua komo nui ʻo Hasung i ka mākeke mīkini wili ʻōwili, a ua kūpaʻa ʻo ia i ka hāʻawi ʻana i nā mea kūʻai aku me nā wili ʻōwili mea hoʻonaninani kiʻekiʻe, nā mīkini ʻōwili gula a me nā huahana a me nā lawelawe ʻē aʻe.