SunflowerZZ,
That group of three is Greist made adapter feet. You put them on the machine then attach the hemmers, and some other feet to that. They also double as quilting feet.
If you can find a Greist or some Kenmore attachment manuals it shows them and describes how to use them.
ETA: But you know this already. I should have read your link first then posted .... duh.
Joe
Last edited by J Miller; 03-08-2014 at 07:59 AM.