The 799 is used in conjunction with the Park Tool HTR-1 Head Tube Reaming and Facing Set to ream head tubes that use the 1 1/4" internal cup headset standard.

• Sized for 1 1/4" internal cup headsets
• SHIS: sized for IS47 head tubes
• 47 mm outer diameter
• Requires use of the 750.2 Centering Cone Adapter
  

NOTE: Always use cutting fluid such as Park Tool CF-2 when machining.