1. Ukungcangcazela.
Xa i-screw i-rusty, ayivumelekanga ukuba isuswe ngenkani nge-wrench. Thepha i-screw nge-wrench, qhawula i-sundries kwindawo enomhlwa, jika i-screw ngakwesobunxele nasekunene kunye ne-wrench, emva koko unokusisusa isikrufu. Yachithwa.
2. Umlilo.
Ukuba isikrufu sinomhlwa kakhulu, ungasebenzisa i-welding yombane ukwenza i-screw, utshise i-screw ebomvu, kwaye uwise i-oyile yokuthambisa kwisithuba se-screw, linda ixeshana, kwaye ususe isikrufu ngesikrufu.