The Bernina Patchwork Seam Snap-on Sole #37 is purpose-built for quilters and patchwork sewists who demand precise seam allowances. Designed to work with straight stitching, this foot produces consistent 1/4-inch and 1/8-inch (6 mm and 3 mm) seam allowances — the standard measurements used in quilt piecing and patchwork construction. Three evenly spaced notches on the side of the foot provide reliable lateral guidance, and a narrow thread channel groove beneath the flat sole keeps fabric feeding smoothly for clean, accurate seams. Key Features Produces accurate 1/4-inch (6 mm) and 1/8-inch (3 mm) seam allowances for standard quilt piecing and patchwork work. Three evenly spaced notches on the side of the foot, spaced 1/4 inch apart, assist with precise lateral alignment of fabric pieces. A narrow groove on the underside of the flat sole acts as a thread channel, promoting smooth and even fabric feeding. Flat sole design keeps fabric layers stable during straight-stitch piecing, reducing shifting and improving accuracy. Snap-on attachment mechanism allows for quick, tool-free installation and removal on compatible Bernina machines. Compatible with all Bernina machines equipped with Snap-on Shank #78, covering a wide range of models across multiple decades. Optimized for straight stitching, making it ideal for the repetitive seaming demands of quilt top construction. Specifications Specification Detail Foot Number #37 Attachment Type Snap-on Required Shank Bernina Snap-on Shank #78 Seam Allowances 1/8 inch (3 mm) and 1/4 inch (6 mm) Side Notches 3 notches, spaced 1/4 inch apart Stitch Type Straight stitch Brand Bernina