Inaliti yokuthunga, esetshenziselwa ukuthunga ngesandla, iyithuluzi elide elizacile elinephuzu elicijile ekugcineni kanye nembobo (noma iso) yokubamba intambo yokuthunga.Izinaliti zakuqala zazenziwe ngethambo noma ngokhuni;izinaliti zesimanje zenziwa ngocingo lwensimbi oluphezulu lwekhabhoni futhi ziyi-nickel- noma i-18K yegolide-efakwe ngegolide ukumelana nokugqwala.Izinaliti zokufekethiswa ezisezingeni eliphezulu zigcwele izingxenye ezimbili kwezintathu zeplatinamu kanye nengxenye eyodwa kwezintathu ye-titanium alloy. Kunezinhlobo/izigaba eziningi zezinaliti zokuthunga ngesandla, ngayinye yakhelwe ngamasayizi ahlukahlukene kuye ngokuthi ihloselwe ukusetshenziswa.Izinalithi zokuthunga ze-SWELL zifaka phakathiizinaliti zokuthunga isikhwama, electronic ukunitha uhlaka lokweluka indwangu, izinaliti zokuthunga ngesandla.