Wannan na'ura tana ɗaya daga cikin ƙananan samfura na silsilar kadi, dacewa da zalla zalla zalla na halitta kamar cashmere, zomo cashmere, ulu, siliki, hemp, auduga, da dai sauransu ko gauraye da sinadarai zaruruwa.Ana shigar da kayan danye daidai gwargwado a cikin injin kati ta atomatik feeder, sa'an nan kuma a kara bude auduga, hadawa, tsefe da kuma cire datti da na'urar katin, ta yadda nannade toshe auduga carded auduga ya zama nau'in fiber guda daya, wanda zai zama yanayin fiber guda daya. ana tattara su ta hanyar zane, Bayan an buɗe kayan da aka toshe, ana yin su zuwa sama da ɗaiɗaikun ɗaiɗaikun (fitila) ko tarun don amfani a cikin tsari na gaba.
Injin yana ɗaukar ƙaramin yanki, ana sarrafa shi ta hanyar jujjuyawar mita, kuma yana da sauƙin aiki.Ana amfani da shi don gwajin jujjuyawar ɗan ƙaramin adadin albarkatun ƙasa, kuma farashin injin yana da ƙasa.Ya dace da dakunan gwaje-gwaje, wuraren kiwon iyali da sauran wuraren aiki.
