Women in Cages is a 1971 film in the women in prison sexploitation subgenre, co-produced by Roger Corman and directed by Gerardo de Leon. It was prominently featured in the Planet Terror portion of the 2007 film Grindhouse. Grindhouse director Quentin Tarantino said of the film, "I'm a huge, huge fan of Gerry de Leon.... the film is just harsh, harsh, harsh." He described the final shot as one of "devastating despair".
(Summary from Wikipedia)