Features: Strong magnetic force ,convenient to use and makes your sewing more labor-saving. The magnetic seam guide has a strong magnet on the back and can be directly sucked onto the sewing machine needle plate to make the stitches more straight. It can be applied in the sewing machine of iron plate. This product is suitable for many kinds of old-fashioned sewing machines, industrial sewing machines. Suitable for garment factories and individuals to do linear positioning, easy to install and use. Also suitable for sewing beginners,it can also be used for suction needle storage. Specification: Material:Metal+Strong Magnet Package List: 6*Magnetic Seam Guide Package List 1Strong magnetic force ,convenient to use and makes your sewing more labor-saving. 2The magnetic seam guide has a strong magnet on the back and can be directly sucked onto the sewing machine needle plate to make the stitches more straight. 3This product is suitable for many kinds of old-fashioned sewing machines, industrial sewing machines. 4Suitable for garment factories and individuals to do linear positioning, easy to install and use. 5Also suitable for sewing beginners,it can also be used for suction needle storage.