Inqubo ekhethekile kanye nezinzuzo zesici:
1. Ubuso bufakwe uthayela, nokukhanya okuphezulu, ukubukeka okuhle, nokumelana nokugqwala okuqinile (izinqubo zokwelashwa ongazikhethela zona ezifana nokucwenga kwe-zinc emhlophe, ukufakwa kwe-zinc kombala, i-phosphating emnyama, i-phosphating empunga, ne-nickel plating).
2. I-Carburized and tempered, ubulukhuni bobuso buphezulu, obungafinyelela noma budlule inani elijwayelekile.
3. Ubuchwepheshe obuthuthukisiwe, i-torque encane yokusonta nokusebenza kokukhiya okuphezulu.