Amatshini okugaya okuqengqeleka kwesinyithi ngoomatshini abakhethekileyo eyilelwe ukuqhubekeka ngesinyithi ezingenasixa esikhulu sentsimbi. Ezi zinyithi, ezinje nge-aluminium, ubhedu, ikhole, kunye ne-zinc, zineepropathi ezizodwa ezenza zibaluleke kwimizi-mveliso eyahlukeneyo, kubandakanya i-aerospace, iimoto, kunye ne-elektroniki. Ukusila okutya kusetyenziswa uthotho lwee-rollers ukunciphisa ubukhulu bezinyithi,