ʻO kapani puka he mea pili pono no ka hookomo ana i ka puka a me ka puka keena. ʻO ka hana nui ʻo ia ka wehe a pani i ka puka a me ka puka keʻena, a ʻo ia hoʻi ka ʻāpana haʻahaʻa o ka puka. Wahi a ka mea, aia nā ʻeke hao, nā ʻeke kila kila, nā ʻeke keleawe a me nā ʻeke alumini. Hiki ke koho ʻia nā hinges o nā mea like ʻole e like me nā kaiapuni hoʻohana like ʻole. Hiki ke hoʻokomo i nā puka lāʻau a me nā metala. Hiki ke hoʻohālikelike ʻia mai ka 1"-100", a hiki i ka mānoanoa mai 0.6mm-10mm, hiki ke hoʻololi ʻia e like me nā koi o ka mea kūʻai aku. ʻElua ʻano o nā hinges me nā bearings ʻole. ʻO nā pine o nā hinges i hana ʻia me ka hao a me ke kila kila. Hiki i nā mea kūʻai ke koho e like me kā lākou makemake. ʻO ka hinge puna he ʻano hinge hou. Hoʻolakoʻia ka hinge me kahi punawai, hiki ke hoʻololi i ka wikiwiki o ka paniʻana i ka puka. Hiki ke hoʻolakoʻia nā paona puka likeʻole me nā hinges puna. Aia pū kekahi mau ʻeke T-like, welded hinges, a me nā hinges kūikawā kūikawā no ka hoʻokō ʻana i nā pono o nā wahi like ʻole.