Deluxe Large Magnetic Seam Guide For Sewing Machines. This extremely powerful extra large guide provides you the greatest versatility of any guide ever seen. For stitching perfect even seams along straight edges and curves. Can be rotated 90 degree when a short guide surface is required. The extremely powerful built-in magnet permits ready mounting and dismounting; no tools or screws needed. Size : Length 2-1/2", Width 1-3/8", Height 1/2"