Mu nganda zikora inganda, ibifunga nibintu byingenzi byo guhuza no gutunganya ibice. Ni ubwoko butandukanye kandi bufite imirimo itandukanye. Kuva kuri bolts, nuts, screw, kugeza kumurongo, gukaraba, kugumana impeta, pin, nibindi, buri cyuma kigira uruhare rukomeye. Ariko, imbere yuburyo butandukanye bwo guhitamo, ni ngombwa cyane cyane kwemeza ko ibyatoranijwe byatoranijwe bishobora guhura nibisabwa byakazi.