For use on both 5.5mm and 9mm BERNINA sewing machines, as well as BERNINA Q Series machines Bernina foot #72 allows you to sew along quilting rulers to create decorative quilt designs such as lines, feathers, circles etc. Any commercial Plexiglas longarm quilting rulers with a 1/4" thickness can be used. The height of the foot's sole makes it possible to quilt along all the edges of these rulers which is of utmost importance especially with circles.