This foot combines AcuFeed's perfect feeding with a guide allowing you to stitch neatly in the ditch.  Also ideal for top stitching.  Attach the ditch quilting foot to the dual feed foot holder (twin) provided with your machine.  For 9 mm, AcuFeed-compatible machines, including:  

CM17, CM8, CM7, CM6, 9450, 9480, 9410, Skyline S9, Skyline S7, Skyline S7AE, Skyline S6, Skyline S6AE.