Park Tool XL Centering Cone Adapter. Features: Oversized adapter for centering cone on PK-6710 (HTR-1 tool set) Designed for larger head tubes (0-Stack, Integrated, 1.5) Use with PK-6730 (#690-XL facing cutter) and PK-6731/2 (#767/768 facing pilots) or PK-6726/8 (#756S/758S reamer/facer sets). Sold individually Specs: Description:XL centering cone adapter, #750.2 Remarks:Use with PK-6737 (#690-XXL facing cutter) & PK-6735 (#750 centering cone)