I don't use the pinking blade for quilting either, just for garment sewing in places where you need to grade seam allowances or with bulky fabrics that could leave a ridge when you press them open. I have only used them to trim a 3/4" or 5/8" seam allowance down to about 3/8" or to pink the raw edge of ravely bulky fabric that I will line. I can't think of a circumstance when you would need them with quilting cottons or narrow seams. Nice quilting cottons shouldn't fray enough to need them.