"Caliber 9" is a 1972 Italian crime film directed by Fernando Di Leo. It is part of the poliziotteschi genre, which focuses on police and crime stories in Italy during the 1970s. The film follows a criminal named Ugo Piazza, who is released from prison and becomes embroiled in a violent power struggle among gangsters. The plot centers around Piazza's attempts to reclaim his life while dealing with betrayal and violence. The film is known for its gritty realism, intense action sequences, and a strong portrayal of the criminal underworld in Italy. It has gained a cult following over the years for its stylish direction and memorable characters.