Because it's designed for straight-stitching, Patchwork foot #37 is ideal for sewing 1/4" or 1/8" (approx. 3 or 6mm) seam allowances.
In addition, patchwork foot #37 features three evenly spaced markings (1/4" apart) on its side that make the square insertion of pieces in patchworking easier. A narrow groove under the flat sole serves as a thread channel for smoother piecing.
TIP: a large sewing table or cabinet makes quilt piecing easier and promotes greater precision as it supports your patchwork better.