Thumba la thumba lachikwama la zipper limatchedwanso thumba lodzithandizira.Thumba lodzithandizira lokhala ndi zipper lingathenso kutsekedwa ndikutsegulidwanso. Malinga ndi njira zosiyanasiyana zomangira m'mphepete, zimagawidwa m'magawo anayi ndi ma banding atatu. Kumanga m'mphepete zinayi kumatanthauza kuti pali wosanjikiza wamba wamba m'mphepete kuwonjezera pa kusindikiza zipper pamene katunduyo atuluka mufakitale. Mukagwiritsidwa ntchito, chomangira cham'mphepete wamba chimafunika kudulidwa kaye, kenako zipperyo imagwiritsidwa ntchito kuzindikira kusindikiza mobwerezabwereza. Njirayi imathetsa vuto loti mphamvu ya zipper m'mphepete mwake ndi yaying'ono ndipo siyenera kuyenda.