The 690-XXL is a facer for the large headtubes. It has a nominal outside diameter of 65mm. Use the 690-XXL facer with #750.2 Centering Cone Adaptor and #789 Reamer or #790 Pilot when facing head tubes with 55.95–55.90mm I.D.
NOTE: For sharpening services of cutting tools see Park Tool Sharpening Services. Always use cutting fluid such as Park Tool CF-2 when machining.
SHIS terminology: faces headtube faces up to the ZS56 or EC56