Pfaff sew on button foot cat c sewing on buttons can be a tedious job but not when you use the sew on button foot use it to easily sew 2 or 4 hole buttons of various sizes in place just set the stitch width to match the spacing between the holes and your machine does all the work by including a shaft you can even sew on buttons with a thread shank see illustration 1 mark on the fabric where you want the button to be placed 2 snap on the sew on button foot 3 lower feed dogs 4 i