Heavy duty, shop quality tool for installing and removing Shimano, Truvativ, Race Face, FSA and Campagnolo 16-notch external bearing bottom bracket cupsMade from investment cast steelCan be turned with a 3/8` ratchet, 1` wrench or FRW-1 freewheel remover wrenchExternal BB Socket16-NotchBBT-19.2Multiple3/8`UPC/EAN/GTIN: 763477000521