The griest attachments need a master foot that is side clamp, it allows you to remove and replace various attachments on the same master foot.
The other attachments looks like Kenmore attachments, that flatter wider bobbin is for a Kenmore as well.
the attachment that looks like it is glowing has a tiny dark button you can almost see, it's side clamp and allows those GRIEST attachments to snap in or off.
Last edited by Beautiful_Sound; 07-19-2015 at 04:55 PM.