The Cose Magnetic Sewing Guide is an accessory that magnetically attaches to the sewing machine plate, used to maintain a constant distance between the needle and the fabric edge, ensuring straight and parallel seams without the need for pre-marking lines. It is especially useful for long, straight seams, such as hems and joining pieces, where a small deviation would be visible in the final result. The magnetic attachment allows for quick adjustment of the distance according to the desired seam width. It is a very popular accessory for those who sew regularly and seek greater precision.