Specifications: the sewing machine feet are made of high quality metal, so they are durable and not easy to rust. There are three types in 3mm, 4mm and 6mm, which can roll out the width of 3mm, 4mm or 6mm. These hem presser feet are suitable for household multifunctional sewing machines. How to use: 1. Place the fabric backside up and place under the presser foot. 2. Lower the needle so that it is located 1/8 inch (about 3mm) from the edge of the cloth, and then sew 2-3 stitches first. 3. Raise the presser foot and needle. 4. Tighten the fabric back and forth so that it passes through the cloth roll slot at the front of the presser foot. 5. Make sure that the edge of the fabric is under the needle, and then lower the presser foot lever. 6. Sew 2-3 stitches slowly to ensure that the fabric is fed into the roll groove at the front of the presser foot. 7. Continue to sew until the hemming is completed. Item name: hem presser foot material: metal quantity: 3pcs/set (1 x 3mm + 1 x 4mm + 1 x 6mm) features: durable, sewing aid, easy to use pressed hem width: 3mm/0.12", 4Mm/0.16", 6Mm/0.24" (Approx.) Notes: due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 3 x hem presser feet