Type: Straight stitch (no zigzag or decorative stitches)
Construction: Very heavy all-metal body (cast iron/aluminum frame)
Speed: High-speed sewing (up to ~2000 stitches per minute in many versions)
Use: Tailoring, quilting, jeans, canvas, upholstery
Strength: Can sew multiple layers of thick fabric smoothly
Design: Built like an industrial machine but usable in home/workshop setups