As part of Lucius Fox's improvements on the Batsuit, he adds blades on the suit that shoot out of Batman's arm, which are similar to the batarang. To gain leverage over his fight with the Joker, Batman shoots these blades at him, distracting him and giving Batman the upper hand. His true batarangs are only seen once during the film; when Bruce Wayne puts away his Batsuit after deciding to turn himself in to the police, he takes a minute to pick up and stare at one of his batarangs, and then proceeds to put it away with the rest of his gear.