JUKI MO654DE Portable Thread Serger Sewing Machine 2/3/4 Thread serger with automatic rolled hem Color coded threading breakaway looper external adjustment for stitch length and differential feed Powerful knife system with dedicated drive mechanism. Sewing Speed: Max. 1500 spm Sews light to heavy weight fabric. Max. Stitch Length- 4mm Safety Switch machine will not run when swing cover is open