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Old 12-04-2015, 07:43 AM
  #3  
Rodney
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Join Date: Oct 2013
Location: Centralia, WA, USA
Posts: 4,890
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They spin various tool bits really fast. They can be useful for cleaning small areas among other things. So far I haven't needed one on a sewing machine but that doesn't mean it wouldn't be useful.
Rodney
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