This set includes six smooth bottom piping walking feet designed for single needle walking foot industrial sewing machines. The sizes range from 1/8 inch to 1/2 inch, including 1/8", 3/16", 1/4", 5/16", 3/8", and 1/2". Each set provides precise attachments suitable for creating welting and piping with consistent results. These feet are compatible with various models of industrial sewing machines, including those from brands such as CONSEW, JUKI, and others. Please ensure compatibility with your machine before purchase, as these feet are specifically designed for single needle walking foot machines. If unsure, technical support can be provided. The package offers a comprehensive solution for sewing piping and welting, making it ideal for professional and hobbyist sewing projects requiring accurate piping attachments.