FEIYUE FY503 Heavy Duty Overlock Serger Machine – 2/3/4 Thread Capability | Differential Feed, Free Arm Sewing, Adjustable Stitch & Seam Width

2/3/4 Thread Heavy Duty Overlock Machine: Supports 2-thread, 3-thread, and 4-thread overlock stitch formations, suitable for wrapped edge overlock, standard overlock, flatlock, rolled hem, and mock safety stitch applications on light to heavy fabrics.

Wide Range of Stitch Types and Seam Finishes: Capable of producing overedge stitches, rolled hems, flatlock decorative seams, wrapped edge overlock, and 4-thread ultra-stretch mock safety stitches through different needle positions and threading combinations.

Differential Feed for Stretch and Knit Fabrics: Equipped with an adjustable differential feed system (ratio 1:0.7 to 1:2.0) to prevent fabric stretching or puckering, ideal for knits, jerseys, bias-cut fabrics, and decorative gathering.

Fully Adjustable Stitch Length and Seam Width: Stitch length adjustable from approximately 2–4 mm, with seam width adjustable by needle position and width adjustment knob, allowing precise control for various fabric thicknesses and sewing techniques.

Free Arm Sewing and Practical Mechanical Design: Features a removable cloth plate that converts the machine into a free arm for sewing tubular items such as sleeves and trouser cuffs, along with a movable upper knife that can be disengaged when trimming is not required.