He ʻano ʻano mea hana i hoʻolālā ʻia no ka mālama ʻana i nā haʻahaʻa kiʻekiʻe a hāʻawi i ka hana maʻemaʻe, i kūpono loa ia no nā noi hana kaumaha e like me nā mea hui pū.
Ua koho ʻia nā ʻūhā bevel spiral honua no nā mea hui ʻia ma muli o ko lākou hiki ke lawelawe i nā ukana kaumaha, hāʻawi i ka hana maʻalahi a maikaʻi, a hāʻawi i ke ola lawelawe lōʻihi me ka mālama liʻiliʻi. Pono kēia mau hiʻohiʻona no ka hilinaʻi a me ka hana pono o nā mea hana hana kaumaha e like me nā mea hoʻohui.