Specifications: Product Name: Sewing Machine Parts Material: Plastic, Metal Use: Overlock Application: General purpose for household multifunctional sewing machines. Old-fashioned, miniature and industrial sewing machines are not available. NOTE: General purpose for household multifunctional sewing machines. Old-fashioned miniature and industrial sewing machines are not available. The side knife attachment cuts the fabric as you sew a seam. Sew seams and seam finishes at the same time. Easily sew an overcasting stitch to perfectly align the thread with the edge of the fabric. You can cut along the line of fabric when sewing it, just attach it to the machine and replace it with the presser foot. Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display. For color difference, please refer to the actual item you received.