Ruler quilting  work has rapidly grown in popularity in recent years and this foot is designed specifically work with 1/4" Plexiglass rulers.
Create decorative quilt designs including lines, feathers and circles, making it easier to quilt your sewing projects. 
Markings on the inside and outside allow for precise sewing, and the dial lets you adjust the height of the foot individually to the fabric thickness.
The ability to adjust this foot mean yous can raise or lower the foot to the thickness of your sewing project so it just skims the surface.