The BBT-19.2 is a heavy duty, shop quality tool for installing and removing Shimano®, SRAM®, Truvativ®, Race Face®, FSA® and Campagnolo® 16-notch external bottom bracket cups with an outside diameter of 44 mmUpdated to be more accurate and longer lasting, the BBT-19.2 can be turned with a 3/8 inch drive torque wrench or ratchet, a 1 inch wrench, or a Park Tool FRW-1 Freewheel Remover Wrench