He kūpono no ka hui pū ʻana ʻelua o nā rivets cap, hollow rivet, snap button, prong snap button… etc.
1.Easy e hana, haʻahaʻa malfunction, i mea e hoʻonui ai i ka huahana a me ka uku haʻahaʻa.
2. Me nā kīʻaha aniani ʻoi aku ka maʻalahi o ka mea hoʻohana e nānā i nā pihi nui a hoʻopiha i nā kīʻaha i mea e hōʻemi ai i ka helu o ka hoʻomaha.A ʻo nā kīʻaha aniani he ʻaila-paʻa a paʻakikī ke wāwahi.
3. Hoʻopiliʻia me ka helu heluʻeono, ua maʻalahi ka heluheluʻana i ka puka.
4.To hoemi ewaring a me ka walaau me ka wai lubrication.
Hoʻohana ʻia ka carbide 5.Tungsten no ka hana ʻana i nā make a me nā ʻāpana i hoʻolōʻihi ʻia ke ola lawelawe o ka make.
6. Hoʻolako ʻia me ka ʻōnaehana hoʻokele optical-fiber i hoʻopaʻa ʻia i nā hōʻailona e IC, e kū ka mīkini i 3 mau minuke ʻoiai ʻaʻohe pihi a ʻaʻole pololei ka mīkini.Eia kekahi, e ʻālohilohi ana ke kukui ʻala a me ke kukui ma ka panel.