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Having a smooth, undamaged bobbin case in your machine plays a vital role in good stitch quality. This unit holds your bobbins and provides tension to your stitches as they are formed.

• Take time to examine your bobbin case for burrs, needle punctures, and any damage on the top, side, and bottom of the bobbin case.
• Damage like this can cause shredding, skipped stitches, loose stitches, and poor tension quality. 
• Scroll down for video tutorials on skipping and shredding stitches.