Nthawi zambiri, ndi phula lamatabwa lomwe lili ndi mutu wa chala, mano okhuthala komanso mawonekedwe olimba, komanso aloyi ya aluminiyamu ndi pulasitiki.Mtundu wapadera wa zomangira zomwe zimagwiritsidwa ntchito potsegula ulusi m'mabowo achitsulo amatchedwa tap.
Zomangira zokha zomangira zopanda zitsulo kapena zitsulo zofewa, siziyenera kugunda pansi pa dzenje ndikugogoda;Zomangira zodzibowoleza zimalozedwera, kuti "kudzigonjetsera";Zomangira wamba zimakhala zathyathyathya - zamutu komanso za makulidwe ofanana.
Self tapping screw ndi kunena: kubowola mabowo popanda kugogoda mabowo, wononga ndi kusiyana kwakukulu, mutu ndi woloza, mtunda wa dzino ndi wokulirapo, ndipo kugogoda kwa waya wa chip kumakhala kofanana, sikungathe kugunda molunjika, zitsulo ndi pulasitiki nthawi zambiri amagwiritsa ntchito njirayi.
Ikhoza kuphatikizidwa pazinthuzo, kudalira ulusi wake, idzaphatikizidwa thupi "pampopi - kubowola, kufinya, kukakamiza" kuchokera ku ulusi wogwirizana, kuti agwirizane wina ndi mzake.