The Park Tool BBT59 Ultegra Bottom Bracket Tool is used for the installation and removal of 16notch external bearing bottom brackets It is coloured anodised for easy identification in your toolbox and made from precision CNC machined aluminium It has a ratchettorque wrench compatible 38 drive Key Features 41mm OD cup Fits Shimano BBR60 Ultegra 11speed 6800 series Shimano MT800 Fits 16notch rotor disc lockrings CNC machined aluminium Anodised coating

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