Park Tool Spoke Key SW-40C - for 3.23mm Nipples

Four-Sided Spoke Wrench
The unique four-sided design provides extra strength and support, helping to prevent slipping and deformation of aluminum nipples. It utilizes the same world-famous design and high-quality materials as our three-sided spoke wrenches.

The SW-40 features the same 3.23mm (0.127") size as the SW-0 (black).

The Park Tool SW-40 incorporates the renowned design and premium materials of our three-sided spoke wrenches, enhanced with a unique four-sided wrench design for added strength and support to prevent slipping and deformation of nipples. Each SW-40 is proudly made in the USA, heat-treated, and nickel-plated for durability. Park Tool spoke wrenches are vinyl dipped for easy size identification at a glance.

SW-40 Features
- Sized for spoke nipples with 3.23 mm (0.127") wrench flats
- Equivalent to Park Tool SW-0
- This size is commonly found on higher-end bikes
- Typical compatible nipple brands include DT Swiss, Sapim, Wheelsmith, Pillar, and many others — always measure to be sure