ʻO ka metala perforated he ʻāpana metala i hoʻopaʻa ʻia, hana ʻia, a kuʻi ʻia paha e hana i ke ʻano o nā lua, nā slots, a me nā ʻano nani like ʻole. Hoʻohana ʻia ka nui o nā metala i ke kaʻina metala perforating, ʻo ia hoʻi ke kila, aluminika, ke kila kila, ke keleawe, a me ka titanium. ʻOiai ʻo ke kaʻina hana o ka perforating e hoʻonui i ke ʻano o nā metala, loaʻa iā ia nā hopena maikaʻi ʻē aʻe e like me ka pale a me ka hoʻopau ʻana i ka walaʻau.

ʻO nā ʻano metala i koho ʻia no ke kaʻina perforation e pili ana i ko lākou nui, anana mānoanoa, nā ʻano mea, a pehea e hoʻohana ʻia ai. He liʻiliʻi ka palena o nā kiʻi i hiki ke hoʻopili ʻia a hoʻokomo i nā puka poepoe, nā ʻāpana, slotted, a me hexagonal, e inoa i kekahi.