This attachment is for a Straight Stitch Machine
not only is the Rick-Rack "Blind Stitched", but the hem is as well...the Blind Stitch Attachment does that, and will work properly on your Featherweight 221 and 222K sewing machine
as well as any other low, vertical shank Singer
like 15, 66, 99, 127, 128, 185, 192, 201, 221 and 222K. Comes with the Instruction Manual
and Original Box.