Isu tinopa huwandu hwakasiyana hweseti screw mhando, kusanganisira kapu point, cone point, flat point, uye imbwa point, imwe neimwe yakarongedzwa kune chaiyo application zvinodiwa. Zvakare, yedu yekuseta screws inowanikwa mumhando dzakasiyana-siyana sesimbi isina tsvina, ndarira, uye alloy simbi, kuve nechokwadi kuenderana neakasiyana mamiriro ezvakatipoteredza uye kusagadzikana kwekuora.