Hey girls, does sewing the hem in your skirt or sewing on stretch fabrics seem difficult? Not with the Elna 664PRO! You and your sewing machine can use a partner. With the Elna 664PRO, you can sew with 2, 3, or 4 threads. The program reference panel will tell you how to adapt your machine for each selection. You can also join seams rounded … in a jiffy!