Product Description: Set of Metal Bobbins for Singer, Kenmore, and White Style Home Sewing Machines Material: Metal Dimensions: Diameter: 20mm (3/4") Thickness: 10mm (a bit over 3/8") Features: Notch in the center for the re-winder Designed for use with oscillating sewing hooks (shuttle hooks) Compatibility: Fits most home sewing machines with oscillating sewing hooks, including: Compatible Brands and Models: Brother: Shuttle Hook Japan: HA-1 Most Shuttle Hooks Kenmore: Shuttle Hook Meister: Shuttle Hook Montgomery Ward: Shuttle Hook Necchi: 575FA New Home: 620FA, 622FA Pfaff: 4240, 4250, 4260 Riccar: Shuttle Hook Singer: 15 Class, 233, 237, 239, 5102, 5107, 5122, 5123, 5124, 5127, 5522, 5528 White: Shuttle Hook Why Choose Our Metal Bobbins? Durability: Made from high-quality metal for long-lasting use. Precision: The exact dimensions ensure proper fit and function in compatible sewing machines. Versatility: Suitable for a wide range of home sewing machines from various brands. Ease of Use: Notch in the center makes it easy to use with the re-winder, providing smooth and consistent operation. Product Details: Set Includes: Multiple metal bobbins (quantity not specified, please refer to the listing for exact number) Condition: Brand new These metal bobbins are an essential accessory for ensuring the smooth operation of your sewing machine, providing reliable performance and compatibility with a wide range of models.