Wannan na'ura tana ɗaya daga cikin ƙananan nau'ikan nau'ikan nau'ikan juzu'i, wanda ya dace da zaren zaren halitta mai tsafta kamar cashmere, zomo cashmere, ulu, siliki, hemp, auduga, da dai sauransu ko gauraye da zaruruwan sinadarai. 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 fiber guda daya, wanda. 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.
