Kamfanin Dashan kamfani ne na rukuni, wanda ke ƙarƙashin ikon sarrafa tarurrukan samarwa da yawa, screws ɗinmu sun haɗa da screws zagaye na kai, screws na itace, busassun kusoshi na bango, waya haƙora, duk samfuran suna iya samar da ƙarfe na carbon da bakin karfe.