Sisebenza, sithumela futhi sinikezela ngohlu oluhle lwekhwalithi yokuthuthwa kwesikhwama. Kokubili inqubo iphathwa ngasikhathi sinye ukugcwaliswa kanye nokuthungwa kwezikhwama. Ukucindezelwa kwezinyathelo ezimbili ezinyaweni kuqala ukuhambisa futhi ngosizo lokucindezela izikhwama zethebula kuqhubekele phambili nasekuqhubekeni ngokuqhubekayo komshini wokushintsha izinyawo uqala inqubo yokuthunga ezikhwameni.