Park Tool Oversized Facing Cutters. Features: Oversized headset facing cutter for PK-6710 (HTR-1 tool set) Designed for larger, low profile (Zero Stack) or 1.5" head tubes Use with PK-6731/2/3 (#767/768/790 facing pilots) and PK-6735 (#750 centering cone). Sold individually Specs: Description:XXL facing cutter, #690-XXL Remarks:Use with PK-6733 (#790 facing pilot) or PK-6723 (#789 reamer) & PK-6735 (#750 centering cone adapter)