Vintage Singer sewing machine low shank adjustable tucker foot - This attachment is compatible with a 221 / 222K Featherweight, as well as other low shank machines including the 15, 66, 99, 127, 128, 185, 192, 201, 306, 319, 328, etc. Very nice vintage condition, clean and rust free. Genuine, original Simanco part #36583.