Stitch In the Ditch Foot High Shank NR 31S This superior edge stitch foot is also known as a Stitch in the Ditch. For even-sided stitching when joining two pieces of fabric.
Adjustable Stitch in the Ditch Foot for IDF system - HUSQVARNA VIKING®
Compact Edge Sewing Foot (Stitch in the Ditch) - Juki UK Sewing Machines