Precision CNC machined aluminum tool for the installation and removal of 16-notch x 49mm external bearing bottom bracketsAnodized for easy identification and featuring a ratchet/torque wrench compatible 3/8` driveFits Wheels Mfg Thread Together, FSA MegaEvo, and moreNote: Does not fit Hope BSA30External BB SocketBlue Grey16-Notch49mmBBT-27.3FSA/Multiple3/8`UPC/EAN/GTIN: 763477001368