Dritz® Class 15 Metal Removable & Top Drop-In Bobbins house yarns and threads in sewing, overlock, or embroidery machines to help give you the perfect stitch. Compatible with Singer, Baby Lock, Riccar, Simplicity & White, or other machine brands, Dritz® Class 15 Metal Removable & Top Drop-In Bobbins can be used with removable and top drop-in bobbin cases. Made from metal, Dritz® Class 15 Metal Removable & Top Drop-In Bobbins are heavier and more durable than those made from plastic. Most machines use a specific bobbin that meets a certain size and composition requirement. Always check the machine’s manual or match a new bobbin to the one that came with your machine. Shop Dritz® Class 15 Metal Removable & Top Drop-In Bobbins online at wholesale prices!