Knock, knock! The Freddy Krueger Door Knocker features the hand of someone you do not want to enter your door, or your dreams. Officially licensed, it features an arm wearing a red and black striped sleeve attached to a brown glove with a blade at the end of each finger, except the thumb. Measuring 17-inches long, it can add some humor and some horror to your home on Halloween. In the Nightmare on Elm Street movie series, Freddy is a children murderer who was killed by the parents of Elm Street. After his death, he is able to invade the dreams of others and if he kills them in their sleep, they die in reality.