Ko ngā peera pōro hohonu he mea kawe i te kawenga radial me te kawenga axial ngawari. He iti ake te tauwehenga o te waku, he tere whakawhāiti teitei, he whānuitanga rahi me ngā rerekētanga o te hanganga, he pai mō ngā taputapu tika, ngā motuka haruru iti, ngā motuka, ngā motopaika, me ētahi atu mīhini noa, he momo peera e whakamahia whānuitia ana i roto i te umanga mīhini.
