Bawul ɗin ƙwallon ƙafar ƙarfe mai cikakken walƙiya bawul ne na yau da kullun, babban fasalinsa shine saboda ƙwallon da bawul ɗin suna walda su cikin yanki ɗaya, bawul ɗin ba shi da sauƙi don samar da ɗigogi yayin amfani.An fi hada da bawul jiki, ball, kara, wurin zama, gasket da sauransu.An haɗa tushe da abin hannu na bawul ta cikin ƙwallon, kuma ana juya ƙafar hannu don kunna ƙwallon don buɗewa da rufe bawul ɗin.Abubuwan samarwa sun bambanta bisa ga amfani da mahalli daban-daban, kafofin watsa labarai, da sauransu, galibi carbon karfe, bakin karfe, gami karfe, simintin ƙarfe, da dai sauransu.