Old 04-01-2011, 06:17 PM
  #7  
fabric_fancy
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Join Date: Jan 2010
Location: at my sewing machine
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they are used for embroidery and frame quilters.

prewound bobbins have more thread on them then we can do at home on our sewing machines.

the hope is, with the prewound you can complete the entire project without having the bobbin run out of thread.
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