Ibitugu bitugu nibintu bisanzwe bihuza imashini ikoreshwa muguhuza ibice kandi ikora neza mugutwara imitwaro hamwe nibidukikije. Yashizweho kugirango itange uburebure bwuzuye na diametre kugirango ubone inkunga nziza kandi uhagarare ibice bihuza.
Umutwe wuwo mugozi mubisanzwe ni umutwe wa mpandeshatu cyangwa silindrike kugirango byorohereze gukomera hamwe nigikoresho cya trenchion. Ukurikije ibyifuzo bikenerwa nibisabwa, imigozi yigitugu ikozwe mubyuma bidafite ingese, ibyuma bivanze, cyangwa ibyuma bya karubone kugirango barebe ko bifite imbaraga zihagije no kurwanya ruswa.