Change thread fast with these metal bobbins. These metal bobbins provide stability and durability making them long lasting. It is suggested that a metal bobbin should be paired with a metal bobbin case for best results.
Machine Make & Model #:
SINGER: 31-20, 31K19, 31K21, 31K47, 44-13, 44-32, 44-33, 44-34, 44-35, 44-36, 44-37, 44-62, 44-76, 56-2, 57-2, 57-3, 57-4 and 57-14
MetalFits select machinesNo holesSlotMetal bobbin should be paired with a metal bobbin case






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