Husqvarna viking button foot with placement tool cat 6 this presser foot for sewing on buttons raises the button slightly off the fabric to give a slight thread shank to enable easy buttoning and prevent the button from being sewn too tightly to the fabric other information1 thread with matching sewing thread on top and in the bobbin snap on the button foot 2 slide the retractable thread shank guide into the desired position all the way back will give you no thread shank the first posi