"Dull Tool" is a song by American singer-songwriter Fiona Apple, released on the soundtrack to the comedy film This Is 40 (2012). It is the first track Apple wrote solely for a film. "Dull Tool" was produced by Apple's long-time collaborator Jon Brion, and leaked online in November 2012, several weeks before the soundtrack hit stores on December 11. Apple recorded a second song for This Is 40, though this was not included in the film nor its soundtrack.