A precision CNC-machined aluminium tool for the installation and removal of select threaded bottom brackets with 16-notch tool fittings, including Wheels Mfg™ Thread Together & FSA® MegaEvo® Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8 drive Fits 16-notch bottom bracket tool fittings with a major diameter of 48mm-50mm and a minor diameter of 46.4mm, including FSA® MegaEvo® and Wheels Mfg™ Thread Together Please note, the BBT-27.3 does not fit Hope™ BSA30