An yanke raga na raga na karafa da aka fadada kuma an zana shi daga faranti na karfe masu inganci, ba shi da haɗin gwiwa, ƙarfin ƙarfi, kyakkyawan aikin hana hawan hawan, matsakaicin farashi da aikace-aikacen fadi.
Ƙarfe da aka faɗaɗa yana da kyakkyawan bayyanar da ƙarancin juriya na iska.Bayan galvanized da filastik mai rufi biyu mai rufi, zai iya tsawaita rayuwar sabis, rage farashin kulawa, kuma yana da launuka masu haske.Kuma yana da sauƙi don shigarwa, ba sauƙin lalacewa ba, wurin hulɗa yana da ƙananan, ba shi da sauƙi don zama ƙura, kuma ana iya kiyaye shi na dogon lokaci.Shine zaɓi na farko don injiniyan ƙawata hanya.