Toner drum wani muhimmin sashi ne na firinta, a cikin firinta na Laser, fiye da kashi 70% na sassan hoto suna maida hankali ne a cikin drum ɗin toner, ingancin bugawa a zahiri an ƙaddara shi ta hanyar toner drum.Harsashin toner ba kawai yana ƙayyade ingancin bugu ba, amma kuma yana ƙayyade adadin kuɗin da mai amfani zai kashe a cikin tsari.