Sew straight seams: place it as far from the needle as you want your line of stitching and it guides the fabric through perfectly as you sew 't move or shift: Strong magnetic hold keeps this gauge in place for easy use Fits most machines Color: silver material: metal Package Contents: 3PCS Magnetic Seam Guide for Sewing Machine Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.