Hāʻawi mākou i kahi ākea o nā metala ferrous no nā mea lole wili kila e hāʻawi i ka ikaika i ka lole like i nā ʻaoʻao āpau. Hoʻolei mākou i ka hao ductile, ADI, CADI, Ni-Resist, Ni-Hard, a me ka graphite compact, a me ka hao hina a me nā metala ʻē aʻe.