Precision CNC machined aluminum tool for the installation and removal of 16-notch external bearing bottom brackets. Featuring updated tooth profiles to optimize the fit between the tool and high performance BB parts. Anodized and laser engraved for easy identification and featuring a ratchet/torque wrench compatible 3/8-inch drive. - 16-notch 39mm OD cups - Fits: Shimano XTR BB93, Dura-Ace BB9000, Token - Added depth to fit Shimano STEPS square drive motor