Studio : Park Tool Publisher : Park Tool Binding : Misc. Product Description Precision CNC machined aluminum tool for the installation and removal of external bearing bottom brackets. Anodized for easy identification and featuring a ratchet/ torque wrench compatible 3/8" drive.The BBT-49 is a precision machined aluminum tool for the installation and removal of 16-notch external bearing bottom brackets with an outside diameter of 39mm. 0
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