Ua māhele ʻia i ʻekolu mau ʻāpana: coarse, medium and detailed.He ʻulaʻula ʻeleʻele ka ʻiʻo koʻikoʻi, ʻulaʻula māmā ka ʻupena waena, a ʻulaʻula a keʻokeʻo ka ʻiʻo maikaʻi.Ua like ka nui o ka palaoa o kēlā me kēia mesh, a ua like ke ʻano o ka palaoa.Kapa ʻia ʻo ia ka kristal angular me nā ʻaoʻao ʻoi a me ka ikaika wili kiʻekiʻe.

No ka wili ʻana i ke kinikini a me nā mea palupalu ʻē aʻe i ka ʻoihana pōhaku.

ʻO ka ʻoihana aniani e wili ana i nā burrs aniani, nā paipu kiʻi kīwī, nā mea kani, nā lens, prisms, aniani uaki, etc.

Metala ʻoihana sandblasting, derusting, wili.Hoʻohana ka ʻoihana paʻi i ka pā offset, a ʻo ka ʻoihana māmā e hoʻohana i ka laʻana plastik, ka ʻili, ka pepa a me nā mea ʻē aʻe.

ʻO ka ikaika wili o ka corundum maoli he haʻahaʻa haʻahaʻa ma mua o ko ka umu uila keʻokeʻo corundum, akā ikaika kona paʻakikī, a loaʻa iā ia nā ʻano o ka ʻāpana e like me ka pūpū.ʻO kāna mau mea maikaʻi ʻo ia ka maʻalahi o ka wili ʻana i nā ʻāpana, ka liʻiliʻi a me ka pāpaʻu one.He maikaʻi a ʻaʻahu ka wili ʻana, hiki ke hoʻomaikaʻi i ka maikaʻi o ka huahana, ʻo ia ka hiʻohiʻona kūʻokoʻa o kēia huahana.ʻO ka emery kūlohelohe he manawa pōkole pōkole, kiʻekiʻe kiʻekiʻe a me ke kumu kūʻai haʻahaʻa, hiki ke hoʻopau i ka pōkole o ke ola lawelawe pōkole.