Specification Packing: 10 pcs material: metal Dimensions: Overall length 36mm (1.42in), width: 9mm (0.35in) Sturdy, durable, not easy to fade, long service life. Helps prevent finger sewing accidents. Also serves as a threading guide. For single-needle lockstitch machines (installed behind the presser foot screw). This is a universal accessory to remove the anchor screws and install the shield. Fits most single needle industrial sewing machines. Suitable for single needle lockstitch machines such as Singer Brother Juki.