A tent pole film is a major blockbuster film that a film studio invests heavily in because it is expected to be hugely successful and profitable. These tent pole films guarantee large profits for studios that they can then use to fund more risky films. Warner Bros. relies heavily on tent pole films based on popular book series and franchises like Harry Potter, Sherlock Holmes, Lord of the Rings, and DC superhero films to be their biggest moneymakers each year. These tent pole films are aimed at appealing to as many of the four audience quadrants - males/females under and over 25 - as possible to achieve maximum viewership and box office revenues.