Ko te momo whakawhanui hihi tino noa i ahu mai i te karu tiro Kariri, he kotahi te karu tāuru kino me te kotahi te karu tāuru pai. Ka whakaatuhia e te karu tāuru he arotahi hihi mariko i te putanga. Mō ngā ōwehenga whakawhanui iti, ko te karu tiro Kariri te mea e whakamahia ana nā te māmā, te iti o te rahi o te kete me te iti o te utu. He mea whakamahi noa ngā whakawhanui hihi hei whakanui i te diameter laser e arotahihia ana ki te rahi iti ake.
E 20 tau te roangaru e arotahi ana ki te whakarato i ngā hua whatu tino tika.