Features the following sizes — measure to be sure you are using the correct wrench for your wheel.

Size 0:

• Sized for spoke nipples with 3.23 mm (0.127") wrench flats
• Equivalent to Park Tool SW-0
• Often found on higher-end bikes
• Typical compatible nipple brands include DT Swiss, Sapim, Wheelsmith, Pillar, and many others

Size 1:

• Sized for spoke nipples with 3.30 mm (0.130") wrench flats
• Equivalent to Park Tool SW-1
• Typically found on older American-made bicycles, including many vintage Schwinn models and wheels built with Union or Torrington spokes — not as common on modern bicycles

Size 2:

• Sized for spoke nipples with 3.45 mm (0.136") wrench flats
• Equivalent to Park Tool SW-2
• Often found on most department store bikes, as well as many other low-to-midrange bikes