This high quality, strong, easy-to-use Magnetic Seam Guide will help you get uniform seam widths. No matter how experienced you are, straight seams (as in accurate seams) can be seriously intimidating. BuddySews Magnetic Seam Guide really helps! Position the little magnet on the needle plate of your sewing machine and let the fabric glide against the guide to finish any project accurately. Unlike traditional magnetic seam guides, our magnetic seam guide wont veer course when sewing through thick fabrics.