Ƙwaƙwalwar ƙwanƙwasa ƙwarƙwalwa na sama kayan aiki ne na musamman don sarrafa katako, musamman maɗaurin zafin jiki. An yi amfani da shi don jigilar fale-falen zafin jiki zuwa ma'ajin billet da tanderun dumama a cikin layin samar da simintin gyare-gyare. Ko jigilar ginshiƙan zafin ɗaki a cikin ma'ajin samfuran da aka gama, tara su, sannan a loda su da sauke su. Yana iya ɗaga slabs ko furanni tare da kauri fiye da 150mm, kuma zafin jiki na iya zama sama da 650 ℃ lokacin ɗaga katako mai zafi.
Biyu girder farantin karfe saman cranes za a iya sanye take da katako mai ɗagawa kuma sun dace da injinan ƙarfe, wuraren jirage, yadudduka na tashar jiragen ruwa, ɗakunan ajiya da ɗakunan ajiya. Ana amfani da shi don ɗagawa da kuma canja wurin dogayen abubuwa masu yawa kamar faranti na ƙarfe masu girma dabam, bututu, sassan, sanduna, billets, coils, spools, tarkacen ƙarfe, da sauransu. Za a iya jujjuya katako mai ɗagawa a kwance don saduwa da buƙatun aiki daban-daban.
Kirjin crane ne mai nauyi mai nauyi tare da nauyin aiki na A6 ~ A7. Ƙarfin ɗagawa na crane ya haɗa da nauyin kai na hoist na maganadisu.