I went back and checked all the feet I had for this machine, even stitched with them to make sure they worked. My shank is more than 1/2" tall also, more like the 1" tall but this is a 221 Singer machine. There's one foot I have no clue what it's for and I searched online and still don't know what it's for but I'll keep it just in case someday I do find out. I have 2 other machines, my Viking I use the most and the little Brother machine I put on the cutting table when I go to attach the binding onto the quilt. Keeps the weight from pulling out of the machine.