I know it doesn't belong on a machine I own. I *think* I picked it up at a sale where I just bought fabric and thread. The only machine there was an older Sears Kenmore in a cabinet - the sort with cams for designs. As I was going through stuff I made a point of putting whatever bits went with the machine into the drawers of the cabinet. But, then again, it might have come from another sale where I picked up the Tailor Professional 834. Who knows? I guess it will have a home in my notions cabinet until I find out!