ngā pū parau mīhini me ngā mata parau

Ko te hea parau e pā ana ki te rino matua o ngā taputapu ahuwhenua tuku iho e mahi ana i te mahi parau oneone. Kei roto ko te hea parau (hei wawahi i te oneone) me te tinana parau (hei huri i te oneone), ā, he mahi nui tana i roto i te ahuwhenua mā te wawahi i te paparanga oneone me te huri i te oneone.
I ngā rā o mua, ko te nuinga o ngā hua he rino maka (pērā i ngā hea parau tawhito o te tekau tau atu i 1970), he mata pango pouri. Nā te hoahoa hea parau tapatoru i whakarei ake te whai huatanga o te wawahi oneone. Kua whakahoutia ngā hua hou ki te whakamahi i ngā rauemi koranu pērā i te maitai manganese (65Mn) me te maitai boron, me te pakeke o te 45-50 HRC i muri i te maimoatanga wera, ka whakapai ake i te ātete ki te kakahu.
He rerekē te hanganga o te hea parau me te tinana parau, e āhei ai te whakakapi motuhake (pērā i te raupapa Tiamana Rabe SUPER). Ko te whānuitanga o te parau ka taea te whakarerekē ko te 33-60 henimita, he pai mō ngā momo oneone rerekē, tae atu ki te oneone onepu ki te oneone uku.