Nā hiʻohiʻona mīkini ʻoki metala:
1. ʻO ka nui o ka ʻoki ʻana he koho
2. Hiki ke hoʻopilikino ʻia nā ʻāpana he nui
3. Kiekie precision oki nui
4. ʻO ka ʻoki ʻoki like ʻole