Zida zowunikiraamagwiritsidwa ntchito makamaka popanga zizindikiro zosiyanasiyana zonyezimira, mbale nambala ya galimoto, malo otetezeka, etc. Mitundu yake yowala imakhala ndi udindo wochenjeza masana, ndipo zotsatira zake zowunikira zowala zingagwiritsidwe ntchito usiku kapena pansi pa kuwala kochepa.Kupititsa patsogolo luso la kuzindikira kwa anthu, kuona chandamale bwino, kudzutsa tcheru, potero kupeŵa ngozi, kuchepetsa ovulala, ndi kuchepetsa kuwonongeka kwachuma.Imakhala mlonda wofunikira kwambiri pamagalimoto apamsewu ndipo ili ndi phindu lodziwikiratu.Kuchuluka kwa ntchito kumakhudzidwa kwambiri ndi chitetezo cha anthu ndi zoyendera, kuyang'anira magalimoto, kuteteza moto, njanji, migodi ya malasha ndi madipatimenti ena.Zida zowunikira anthu wamba ndizovala zonyezimira, pepala lowunikira, nsalu yosindikizira, ndi zina zambiri.
Kugwiritsa ntchito zida zowunikira zaku China pamakampani opanga zikwangwani kudayamba kumayambiriro kwa zaka za m'ma 1980.Kuyambira pamenepo, ndi chitukuko cha China chonyezimira zipangizo makampani, wakhala kukodzedwa pang'onopang'ono.Kuchuluka kwa ntchito kumakhudzidwa kwambiri ndi chitetezo cha anthu ndi zoyendera, kuyang'anira magalimoto, kuteteza moto, njanji, migodi ya malasha ndi madipatimenti ena.Zida zodzitchinjiriza ndi zinthu za anthu wamba zayamba kugwiritsidwa ntchito kwambiri.