The Janome overlocker has colour coded paths making threading the 9300DX so easy. It is a superb 3 or 4 thread overlocker which stitches at up to 1,500 s.p.m.. Whilst it is easy to use, it comes with an instructional DVD to explain the wide range of stitch options. Its sturdy design and precise Janome stitch performance ensures a professional finish every time. It comes pre threaded and has a built in rolled hem feature (no plate change) for easy changeover. The differential feed prevents puckering and stretching and can be used for fun special effects and the upper knife can be deactivated for decorative stitching.