Why you need these bobbin cases Prevents thread fraying and tangling by stopping bobbin rotation quickly when you pause sewing, reducing skipped stitches and wasted thread. Keeps your machine running reliably with a durable stainless steel case that resists corrosion and everyday wear. Provides easy, tool replacement so you can swap cases quickly and minimize downtime. Key features and benefits Compatibility: Designed for Class 15 frontloading sewing machines; 22 mm diameter fits most compatible models on the market. Material: Made from solid stainless steel for long service life, consistent tension, and resistance to rust and wear. Performance: Precision design allows fast cessation of bobbin rotation, improving stitch consistency during frequent stopping and starting. Ease of use: Simple to install and without specialized tools, so maintenance is fast and straightforward. Versatility: Supplied as a set to give you spare or backup bobbin cases for different threads or quick replacements when needed. How it solves common sewing problems Reduces thread snarls and tangles that occur during stopandgo stitching, saving time on rethreading and repairs. Avoids frequent part replacements thanks to corrosionresistant steel, lowering longterm maintenance. Simplifies part swapping for different projects or thread types, keeping your workflow uninterrupted. Practical use scenarios Home sewing and mending: Swap bobbin cases quickly while repairing garments or altering seams to maintain consistent stitch quality. Quilting and patchwork: Use the faststopping bobbin case to prevent thread loops and tangles when pausing between intricate piecing or applique. Small tailoring or alterations : Keep spare cases on hand for efficient changeovers and reduced machine downtime during backtoback jobs. Specifications Type: Bobbin case set for Class 15 frontloading sewing machines Diameter: 22 mm Material: Stainless steel Function: Quick cessation of bobbin rotation to prevent fraying and tangling Installation: Tool, easy to What makes this set stand out Combines precise fit, durable stainless steel construction, and optimized stopping performance in a readytouse set, so you get consistent results across a range of everyday sewing tasks.