Wonke ama-ratchet we-Teng Tools kufanele ahlanzwe futhi agcinwe njalo ukuze kuncishiswe ukuguga nokwelula impilo. Kodwa-ke, ngawo wonke amathuluzi ahlanganisa izingxenye ezihambayo okunye ukuguga kuzokwenzeka ngokuhamba kwesikhathi.
Amathuluzi e-Teng anikezela ngohlu olugcwele lwezinsiza eziphelele nezingxenye ezisele zama-ratchets azo