1. Izikulufu kumazinyo egama elikhulu lentambo eyaziwa ngokuthi; izikulufu ezinezintambo engxenyeni yesikulufu; ukusetshenziswa kwama-screwdrivers noma ama-wrenches ukuguqula izikulufu ukuze ziqinise noma zikhulule ikhanda elikhulu lezikulufa (izikulufu) zekhanda; ukuze zisetshenziswe ngokuhambisana nezikulufu zomshini, indawo ephakathi nembobo enezintambo, eboshwe ngezikulufo empumalanga ezobizwa ngokuthi i-screw cap (inati). Ukusetshenziswa kwezikulufu zokhuni (ngokuvamile ezisetshenziselwa ukhuni, ibanga lentambo libanzi, elicijile), izikulufa zokuzishaya (ezisetshenziselwa kakhulu ukuxhuma izinkuni, ipulasitiki noma ishidi lensimbi, njll.) azidingeki ukusebenzisa i-nati.
2. Izikulufu kumazinyo egama elikhulu lentambo eyaziwa ngokuthi; izikulufu ezinezintambo engxenyeni yesikulufu; ukusetshenziswa kwama-screwdrivers noma ama-wrenches ukuguqula izikulufu ukuze ziqinise noma zikhulule ikhanda elikhulu lezikulufa (izikulufu) zekhanda; ukuze zisetshenziswe ngezikulufo zomshini.