Because the presser foot only has a presser on the left side of the needle, you can sew without catching on the zipper's seam allowance. Unlike a single-sided presser foot, this one presses the fabric on both sides of the needle, reducing skipped stitches and thread breakage. Made in Taiwan Presser foot width: 2mm on the right side of the needle, 6mm on the left side Note: This presser foot is for industrial sewing machines and professional sewing machines (excluding special sewing machines). Please note that it cannot be attached to home sewing machines. Orders will be cancelled if payment is not received by the due date.