The Magnetic Seam Guide Attaches magnetically to a sewing machines stitch/throat plate. Ideal for obtaining an accurate seam width and as a guide to straight stitching.
The Magnetic Seam Guide works along with the marks on the needle plate.
ATTENTION: While it is safe to use the Magnetic Seam Guide on the stitch plate of computerized sewing machines, touching the other parts of the sewing machine (e.g. the LCD screen) can cause serious damage to your machine.
https://www.barnyarns.co.uk/prym-magn...