Includes 3 bobbin cases for sewing machines and 15 bobbins for Singer sewing machines, made of metal with a bobbin holder, suitable for craft sewing, compatible with sewing machines

Functional Bobbins: These metal bobbins allow you to perform intensive sewing tasks, such as crafting and garment repair. They stop spinning more quickly and effectively prevent the bobbin thread from unraveling or tangling when starting and stopping your sewing. Dimensions: Each bobbin case is approximately 20.6 mm in diameter, and each bobbin is approximately 20.3 mm in diameter. Compatible with most sewing machines, including Babylock, Bernina, Brother, Elna, Janome, Kenmore, and Singer. Durable: Both the case and bobbin are made of stainless steel, making them rust-resistant, sturdy, durable, unbreakable, and deformation-resistant.