Ingafakwa kwizakhiwo ezisekelayo ezifana ne-hoppers namathangi, futhi nazo zingasetshenziselwa ukukala ukukala ngokunemba okuphansi. Ingafakwa futhi ekusekeleni noma ekunikezelweni kwezakhiwo zemishini enjengemishini enjengemishini, imishini yokubhoboza, kanye nokugoqa ama-mill ukukhombisa izimo ze-Force ngokulinganisa ubunzima bazo.