This Heavy Duty serger packs a punch. It is designed with a 60% larger cutting knife than other Singer sergers so it cuts through thicker fabrics with ease. The upper knife can also be moved to prevent trimming of fabric while sewing. Its heavy duty metal frame not only makes it more durable but it also keeps the machine steady for skip-free sewing. This serger is a must-have because it sews and finishes seams at the same time, while trimming away the excess seam allowance. Professional looking seams, seam finishes and 1,300 stitches per minute speed make this a real timesaver. You can use 2 threads, 3 threads, or 4 threads for a wide variety of stitch combinations. The 6 different stitch types ensure the perfect stitch, regardless of the project: blind hems, rolled hems, flatlocking, finishing raw edges and sewing seams. The color coded threading system has an easy-to-read diagram right on the machine to make threading effortless every time. The differential feed is fully adjustable and ensures an even feed of fabric as your sew, regardless of the speed and thickness. Enjoy perfectly smooth seams on every type of fabric. It is also useful for keeping stretch fabric and bias-cut fabrics from excessive stretching while you sew. The high performance motor and free arm allows you to power sew through projects and hard-to-reach areas. Two LED lights give a clear view and no shadows when sewing - twice the light of other Singer sergers. Want to take your Heavy Duty serger on the go? No worries, the convenient carry handle makes it portable too. Built-In Stitches (8) - Choose from a variety of stitches for basic sewing, decorative sewing, and more. Adjustable Stitch Length - Customize the appearance of a stitch by increasing or decreasing the distance between stitches. Use this function for various stitch techniques like applique, basting and more. Adjustable Stitch Width - The size of the stitch from left to right is adjustable, to make the stitch sew narrower or wider as desired. Thread Capability (2-3-4) - Choose from seams finishes, hem finishes and decorative edges thanks to a variety of stitch combinations available. Color Coded Threading System - Threading path for each thread is indicated with a specific color to simplify the threading process. Handy reference diagrams are also included right on the machine.