ʻOi a paʻa 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 no nā ʻano pepa āpau, ʻoi aku ka maikaʻi 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 ʻokiʻoki like ʻole a me nā huahana ʻokiʻoki e hana ai, hiki i ka paʻakikī ke hiki i 67 HRC. Hoʻohui, no kekahi mau huahana kūikawā, hana pū mākou i nā ʻāpana tungsten carbide a i ʻole nā lau tungsten carbide inlaid. ʻO kēia kaʻina hana e ʻoi aku ka lōʻihi o ke ola o ka mea hana, a ʻoi aku ka nui o ke ola o ka huahana tungsten carbide blades ma lalo o ke kaʻina hana maʻamau.