1. Coiled dunƙule sunan da aka fi amfani da shi wajen gina ayyukan gine-gine, wanda ke nuna cewa diamita na sandar karfe bai wuce millimita goma ba;
2. Saboda sandunan ƙarfe da ke ƙasa da milimita goma suna da sauƙin lanƙwasa, don rage tsayi kafin jigilar kaya, masana'anta suna jujjuya dogayen sandunan ƙarfe a cikin da'irar, kuma sandunan ƙarfe ana kiran su da'ira mai naɗe a wuraren gine-gine;
3. Ana amfani da shi sosai wajen gine-ginen gine-gine kamar gidaje, gadoji, hanyoyi da sauransu.
4.Steel coil dunƙule don ginawa
Karfe don yin gini, kamar yadda sunan ke nunawa, reshe ne da aka naɗe shi kamar waya. Gabaɗaya, yawancin ƙarfe a kasuwa shine 6.5-8.0-10-12-14. Gabaɗaya, a lokacin haihuwa, ana auna katantanwan da aka naɗe, musamman saboda naɗaɗɗen katantanwa ana naɗe su ne kuma ba za a iya duba su ba. Hakazalika, a kasuwar karafa ta yau, akwai nau'ikan katantanwa guda uku kacal.