Injin walda mai zafi yana amfani da mai kula da zafin jiki don sarrafa zafin kayan aikin da ke kan farantin dumama don walda samfurin.

Ya dace da walda kayan amfanin kwamfuta, kayan bugu, na'urori masu ƙididdigewa, kayan wasan yara, tarho, da sauransu;LED nunin zebra crossing connection, riveting na filastik sassa, filastik gyare-gyaren aiki, filastik yankan, tabo waldi, da dai sauransu.