ʻO ka hōʻuluʻulu manaʻo, ʻo ka channel spring nut he mea maʻalahi, hilinaʻi a kūpono hoʻi i ka hoʻopaʻa ʻana i kūpono no nā ʻano noi. ʻO kāna hana paʻa, ka maʻalahi o ka hoʻohana ʻana a me ka hoʻohālikelike ʻana me nā ʻōnaehana kākoʻo channel like ʻole i koho maikaʻi loa no nā mea hana ʻaelike, nā mea hoʻonohonoho a me nā luna papahana. Ke koho ʻoe i kahi hua puna castellated, hiki iā ʻoe ke hilinaʻi e kūʻai nei ʻoe i kahi huahana maikaʻi e kū a ʻoi aku i kāu mau manaʻo.