Singer Buttonhole Attachment comes complete with 5 cams (1 in the mechanism), feed-dog cover plate, thumb screw, original case and instruction manual. Cams are the following original sizes: 1/2” straight, 5/8" straight, 5/16" straight, 1 1/16" straight and 1 1/16" keyhole.
This attachment fits the Singer Featherweight 221 and 222.
