Atụmatụ:
Kwesịrị ekwesị maka mmepụta uka nke otu nkọwapụta, atọ n'ime otu mkpọpu na-egwe ọka na-egwe ọka na-egwe ọka cutter nwere ike nweta ala oghere nhazi, chamfering, na esịtidem eri nhazi na-enweghị na-agbanwe ngwá ọrụ, ibelata na-abụghị nhazi oge, na-emeziwanye mmepụta arụmọrụ.Kwesịrị ekwesị maka ọla kọpa ọla kọpa, alloy aluminum na ọla ndị ọzọ na-adịghị ferrous.