Dritz offers a comprehensive line of quilting products created with innovation and quality to provide you with the tools you need to create beautiful memories. The Dritz magnetic seam guide is easy to apply and adapts to any position of the metal groove of your machine. For sewing seams, tucks and folds without measuring. The non-slip power grip magnet never comes loose and is exclusive, easy to lift flip case releases when touched. Not recommended for computer controlled sewing machines.