One of the primary functions of a serger is to finish the raw edges of fabric. The machine uses multiple threads to create a tight stitch around the edges, which helps prevent fraying. This is especially useful when working with knit fabrics, which can easily unravel if not properly finished. By serging the edges, you can ensure your garments have a polished and professional look, saving you from the hassle of having to zigzag stitch or use bias tape on each project.

One of the key features of cylinder arm sewing machines is their ability to accommodate larger materials. The open cylinder arm allows for a greater working area, which is essential when dealing with thick leather hides. Additionally, many models come equipped with walking feet, which help in feeding multiple layers of leather through the machine without slipping, ensuring even stitching throughout the process.

Furthermore, sewing heavy-duty machines are built to last, with durable metal frames and components that can withstand the wear and tear of daily use

The shuttle hook case is typically made of metal or plastic and is designed to securely hold the shuttle hook in place while it moves back and forth to catch the thread and form stitches. It is an intricate part of the sewing machine mechanism and requires regular maintenance and care to ensure optimal performance.