Park Tool BB86/92 Shell Reamer. Features: Used to ream and face BB86/92 bottom bracket shells to an ID of 40.98mm Used in conjunction with HTR-1 head tube reaming and facing set (PK-6710), 750.2 centering cone adapter (PK-6735) and 690-XL facing cutter (PK-6730) Specs: Description:BB86/92 shell reamer, #744 Remarks:Use with PK-6733 (#790 facing pilot) or PK-6723 (#789 reamer) & PK-6735 (#750 centering cone adapter)