Washing yawanci karfe ne ko filastik.Ƙungiyoyin da aka ɗaure masu inganci suna buƙatar masu wankin ƙarfe masu tauri don hana asarar pre-loading saboda brinelling bayan an yi amfani da karfin juyi.Masu wanki kuma suna da mahimmanci don hana lalata galvanic, musamman ta hanyar sanya shingen karfe daga saman aluminum.Hakanan za'a iya amfani da su a aikace-aikacen jujjuya, azaman ɗaukar hoto.Ana amfani da mai wanki lokacin da ba a buƙatar juzu'i mai jujjuyawa ko dai daga yanayin aiki mai tsada ko saboda takurawar sararin samaniya.Ana iya amfani da sutura don rage lalacewa da juzu'i, ko dai ta hanyar taurare saman ko ta hanyar samar da mai mai ƙarfi (watau saman mai mai da kansa).
Ba a san asalin kalmar ba;farkon rubutaccen amfani da kalmar shine a cikin 1346, duk da haka, lokacin farko da aka rubuta ma'anarta shine a 1611.
Rubber ko fiber gaskets da ake amfani da su a cikin famfo (ko faucets, ko bawul) azaman hatimi a kan leaks na ruwa wani lokaci ana kiranta da baki azaman washers;amma, yayin da suke kama da kamanni, washers da gaskets yawanci an tsara su don ayyuka daban-daban kuma an yi su daban.
Yawancin masu wanki za a iya kasu kashi uku masu fadi;
Masu wanki na fili, waɗanda ke yada kaya, kuma suna hana lalacewa a gyara saman, ko samar da wani nau'i na rufi kamar lantarki.
Masu wankin bazara, waɗanda ke da sassaucin axial kuma ana amfani da su don hana ɗaurewa ko sassautawa saboda girgiza.
Makullin wanki, waɗanda ke hana ɗaurewa ko sassautawa ta hanyar hana jujjuyawar na'urar ɗaure;Makulli wanki yawanci ma spring washers.
