Bobbin case (high-strength steel) — compatible with sewing machine models 221 and 301 Key benefits Long-lasting durability: Made from high-strength steel for superior wear resistance and structural stability, extending the service life of the sewing machine component. Reliable operation: Precisely designed for seamless integration with models 221 and 301 to maintain consistent performance in everyday sewing. Versatile use: Suitable for a wide range of fabrics and sewing projects, from routine garment repairs to handmade creations. Professional and home ready: Durable enough for frequent use in production or classroom environments, and practical for home sewists who work on daily projects. What it does Protects and houses the bobbin component, providing a stable interface between the bobbin and the machine. Reduces component wear through a robust steel construction, helping avoid premature replacement and downtime. Fits directly into sewing machines 221 and 301 without modification, preserving factory fit and function. Practical use scenarios Clothing repairs at home: Replace a worn bobbin case to restore reliable operation for mending and altering garments. Handmade goods and small craft production: Use the durable steel case for consistent performance when producing accessories, bags, or sewn gifts. Sewing classes and light production: Withstand daily handling and repeated use in educational settings or small-scale tailoring shops. Who should buy it Home sewing enthusiasts who sew regularly and want a durable, reliable bobbin housing. Professional tailors and small production shops needing a wear-resistant component. Educational institutions teaching sewing skills that require components suited to repeated student use. Compatible models: 221 and 301 Material: High-strength steel Function: Bobbin housing / protective case that integrates with the machine to improve component longevity and sewing reliability.