A must have for machines with few or no needle position customization, the Adjustable Zipper Foot is equipped with a screw to alter the position of the presser foot in relation to the needle position. You simply move the screw to adjust the position of the actual foot. You can get as close or as far away from the needle position as you like. By lining up the zipper teeth to run against the side of the presser foot, you can customize the zipper seam width.