ʻOi a lōʻihi nā ʻoki pepa i ka ʻoihana hana pepa, a hiki ke hana ʻia nā lau e like me nā koi o nā mea hoʻohana. ʻO ka mea nui o kēia ʻano o nā ʻāpana he kila kiʻekiʻe, a ʻelua ʻano o nā ʻāpana kila kiʻekiʻe a me ke kila kiʻekiʻe i hoʻokomo ʻia. ʻOi a paʻa, pololei a maʻalahi ka maikaʻi o ka ʻoki ʻana, kūpono i nā ʻano pepa āpau, ʻoi loa no ka ʻoki ʻana i nā pepa i uhi ʻia kiʻekiʻe-gram, koho nā lau i nā māka like ʻole o ke kila kiʻekiʻe (W3, W4, 6542, W18Cr4V, M2, M35, M42, SKH-9, SKH-51) e like me nā ʻano ʻoki ʻokoʻa a me nā huahana ʻokiʻoki e hana ai, hiki i ka paʻakikī ke hiki i 67 HRC. Hoʻohui, no kekahi mea kūikawā. nā huahana, hana mākou i ka integral tungsten carbide blades a i ʻole inlaid tungsten carbide blades. ʻO kēia kaʻina hana i ʻoi aku ka lōʻihi o ke ola o ka mea hana, a ʻoi aku ka nui o ke ola o ka huahana tungsten carbide ma lalo o ke kaʻina hana maʻamau.