For use with Wheels Mfg Bottom Bracket Press (PRESS-7, PRESS-7-PRO or PRESS-9-PRO)29mm open bore adapter is used to press 29mm x 42mm (DUB) sealed bearingsMachined with one step at 29mm OD, which fits into the center of the sealed bearingBearing PressRedDub Bearings29SRAM-OBUPC/EAN/GTIN: 811079025364