Material: The presser foot screw is made of iron material, cylindrical design, strong and durable, fine workmanship, smooth surface, durable and lightweight, easy to carry and minimal maintenance. Size details: These presser foot screws are about 32.5mm long and 10mm in diameter, a total of 12 pieces, please check the size carefully before placing an order, and confirm that the size of the product meets your needs. Large quantity: There are a total of 12 of these spring foot clips, which are enough to be replaced at any time, and do not need to be purchased often, and also contain a box for easy storage and carrying. Widely Compatible: This presser foot screw clamp fits most high shank, single needle home and industrial sewing machinesused to quickly and easily change the presser foot, and screwdriver is not needed. Easy to Use: The item replaces the thumb screw that holds the presser foot. Even for beginners just connect to the sewing machine and turn the nut to help change the footer easily.