Ko ngā kākano taruke me ngā roanga pūngao e whakawehewehea ana i ngā tāhuhu pūngao. Ko ēnei tāhuhu e whakamahi ana i ngā whatu pūngao nui e āwhina ana ki te whakawehe pūmau me te haerehere. Hei tauira mō ngā whatu pūngao matua, ko ngā pūkaha e whakamahi ana i te whakahoki tangata ki te whakaputu i ngā wehi, i te koromiko, me ngā pūnaha kē mai i ngā tangata whakamate. Anō hoki, ko te mahi iwi ka whakauru te whakawehe i ngā pūnaha nui ki ngā pūnaha iti i te wā e taea ai te whakamahi. Kei te kitea e ngā tāhuhu pūngao matua nei ko ngā tāhuhu pūngao matua e whakamahi ana i te kore whakaaro me te kore whakarite i mua i te whakarite.