Timapereka mitundu yosiyanasiyana ya zomangira, kuphatikiza chikhomo, cone point, flat point, ndi galu point, iliyonse yogwirizana ndi zomwe mukufuna kugwiritsa ntchito. Kuphatikiza apo, zomangira zathu zokhazikika zimapezeka muzinthu zosiyanasiyana monga chitsulo chosapanga dzimbiri, mkuwa, ndi chitsulo cha alloy, kuwonetsetsa kuti zimagwirizana ndi zochitika zosiyanasiyana zachilengedwe komanso kukana dzimbiri.