Glass karfe m iska injin ne wani sabon nau'in iska kayan aiki da aka yi da lalacewa karfe gilashi kayan aiki, wanda ya kasance na shaft yau iska injin, saboda iska injin waje frame da lalacewa karfe gilashi kayan aiki, aiki ka'idar shi ne yin amfani da m matsin lamba musayar iska, cimma iska kwarara, iska sanyaya manufa, don haka aka kira Glass karfe m iska injin. Glass karfe m iska injin yana da halaye na juriya lalata, babban iska, low makamashi amfani, low juyawa gudun, low amo da sauransu.