I have NO idea what this presser foot is for, it came with the machine. The lead of the foot is only 1/2 the width of the foot and there is an edge guide on the right edge (as I'm looking at it). The area to the right of the edge guide is open. The needle area of the foot is wide open with the exception of three wires that run the length of the foot.
I'm working on a pattern that requires a 1/8" seam allowance (grrr) and I'm the kind of sewer that prefers to have an edge guide on my foot. I couldn't use my 1/4" edge guide foot because I can't get the needle position far enough to the right to get an accurate 1/8" seam allowance (measured after pressing). So I rummaged around in my sewing box to find a foot that had something on it that I could use as a measurement (even the edge of the foot works for me although I prefer a "guide").
I found this foot ... whatever it is, and by moving the needle to the left I was able to get my scant 1/8" and avoid the wire. I haven't measured it yet but I could probably also use this foot for 1/4" if I move the needle position further to the left and put in the little groove on the left side of the foot.
I LOVE this foot!!! Not only does it have the guide which I love, but the open center allows me to SEE my fabric at the point of needle insertion and I just can't go wrong with it!
Weird foot ... new purpose.
Anyone have any idea what this foot is REALLY used for??