The SINGER? HD6600 Heavy Duty Computerized Sewing Machine offers 215 stitch applications including 6 automatic 1-step buttonhole styles. This machine is a true workhorse with powerful piercing power for thick fabrics or multiple layers and extra-high sewing speed. A top drop-in bobbin for easy threading and viewing and an automatic needle threader that quickly threads the machine making this the perfect machine no matter your skill level.