Grabber is scarred, short and nearsighted and relies on his sense of smell in the dark. He attacks people from underground, grabbing their feet. Grabber's name is an obvious reference to his nearsightedness and that he grabs to find his victims. He's identified in the movie credits as "Sniffer".
After finding Chameleon dead, Grabber - having been tracking Chameleon, Delmar and Crank - opens fire on the latter two with their own machine gun, which he stole. After injuring Delmer, Grabber is killed by him and Crank, who guns him down.
