Alfa provides the Alfa 640 sewing machine with all the features you need for garment construction, decorative sewing, craft projects and basic mending, the Alfa 640 sewing machine offers 31 built-in stitches, free-arm sewing and a 4-step automatic buttonholer. Variable stitch length and needle positioning for easier piping and zip insertion. Sleeve arm/flatbed. Accessory storage. High foot lift for heavy fabrics. Universal tension system. Improved speed control via electronic foot pedal.