Heavy duty, shop quality tool for installing and removing Shimano, Truvativ, Race Face, FSA and Campagnolo 16-notch external bearing bottom bracket cups Made from investment cast steel Can be turned with a 3/8` ratchet, 1` wrench or FRW-1 freewheel remover wrench External BB Socket 16-Notch BBT-19.2 Multiple 3/8`UPC/EAN/GTIN: 763477000521