Juki Pearl Line MO-654DE 2/3/4 Thread Overlock Serger with BONUS Items Includes: Juki Electronic Workbook CD and Juki Instructional DVD Video 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 Sews light to heavy weight fabric Safety Switch machine will not run when swing cover is open