Park Tool SW-1 is made in the USA, and is heat treated and nickel plated for long service. Park Tool spoke wrenches are vinyl dipped to indicate the size at a glance.
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Sized for spoke nipples with 3.30 mm (0.130") wrench flats
This size is typically found on older American-made bicycles, including many vintage Schwinn models and wheels built with Union or Torrington spokes. It is not as common on modern bicycles — always measure to be sure
