Lightweight multifunction overlock machine 800 stitches per minute differential feed improves results when sewing stretch knitted or thin fabrics sews from light to medium rolled hem capability stitch functions (4/3 tread) 3- thread rolled hem 4-thread overlock adjustable stitch width (4.0-7.0mm) adjustable stitch length (1.0-5.0mm) overedge stitch width (6mm l. needle & (3.8mm r. needle) color-coded threading telescopic thread holders with 4 thread spools electronic foot control