These heavy-duty sewing machines feature a powerful motor and extra-high sewing speed. They allow you to sew up 1,100-stitches per minute. They are suitable for tailors, seamstresses, fashion designers, dry cleaners, and industrial sewers. They feature an industrial-grade motor that can sew up to 4,000 stitches per minute. Top drop-in bobbin-type machines feature onboard storage in the removable storage bed. They also have a free arm for easy access to garments while sewing.