This Kenmore Buttonhole Attachment Model 6737 is designed for precise and consistent buttonhole stitching on compatible sewing machines. It comes with a sturdy plastic case and 10 different buttonhole templates, including straight, keyhole, and eyelet styles in various sizes. The attachment is in good working condition with minor signs of use. The original instruction manual is included to guide you through setup and operation, making it a valuable accessory for sewing enthusiasts looking to enhance their machine's capabilities.