[. . . ] 664-664 PRO STITCHES Number of Threads Safety 4 Thread Stretch Knit Gathering 4 Stretch Wrapped 3 Thread Wide Overlock 3 Narrow Hem 3 Rolled Hem 3 Rolled Hem 2 Overcast 2 Flatlock 2 Flatlock 3 TECHNICAL FEATURES Built-in program reference panel Automatic tension release Built-in 2-thread converter Tilting needle clamp Instant rolled hem device Self-threading lower looper Front cover safety system Maximum speed of 1300 rpm Adjustable differential feed 0. 5 to 2. 25 mm Stitch length setting 1. 0 to 5. 0 mm Adjustable cutting width 3. 0 to 7. 0 mm Pre-tension slider ( 3 /4 ­ 2 thread ) Color-coded threading routes Cutting blade Adjustable foot pressure Snap-on presser feet Telescopic thread antenna system Electronic foot control Built-in storage compartment Exclusive Elna accessory box Accessory box Waste tray included Dust cover ­ ­ ­ ­ X X ­ X X X X ­ X X X X X X ­ ­ X ­ X X X X X X X X X X X X X X X X X X X X X ­ X X 664 4/3 X X X ­ X X X X ­ ­ ­ X 664PRO 4/3/2 X X X X X X X X X X X X ES S EN T I AL AC C ES S O R I ES The little extras which make life easier. [. . . ] Go for a windproof vinyl jacket ; why not ? Girls today can do as they please. They can borrow fashion ideas, sure, but no way they're going to dress the same as everyone else. `It Girls' mock the dictates of Planet Fashion: their look has to match their personality, from the right smartphone apps to the smallest accessory. Hemming skirts, sewing stretch fabrics, creating fashionable sportswear, or making a hooded vinyl jacket are all a breeze with our new Elna 664 models. Because the serger, often used in conjunction with a traditional sewing machine, isn't just there for the finishing touches. Life's so good. STITCH IN TIM E Lots of tricks, with standard or ornamental stitches. [. . . ] Stitch length and differential feed (and pre-tension*); all the settings are easy to see, easy to access. *Only available for the Elna 664 PRO. [. . . ]