ʻO ke alakaʻi laina laina me ke kaʻaahi, ka poloka, nā mea ʻōwili, ka mea hoʻopaʻa, reverser, ke sila hope a me nā mea ʻē aʻe. Hoʻokaʻawale ʻia ka poloka alakaʻi laina i ke ʻano flange a me ke ʻano square, ʻano ʻano maʻamau, ʻano ʻano pahu pālua, ʻano ʻano pōkole. Eia kekahi, ua mahele ʻia ka poloka laina i ka mana hoʻouka kiʻekiʻe me ka lōʻihi o ka poloka maʻamau a me ka hiki ke hoʻouka kiʻekiʻe loa me ka lōʻihi o ka poloka lōʻihi.