Park Tool SW-16.3 Internal Nipple Spoke Wrench — 3/16" Hex

• Sized for 3/16" (4.8 mm) hex-shaped internal nipples
• Shaft length: 825 mm (3.25")
• Shaft outside diameter: 7.1 mm (0.28")

Some wheels feature spoke nipples accessible only through holes on the outside of the rim. The SW-16.3 is specifically designed to access these hard-to-reach internal nipples. Features a comfortable dual-density handle and an extra long shaft for deep aero rim cavities.