The bbt 22 is a shop quality tool for installing and removing shimano and isis drive splined twenty tooth bottom bracket cups made from investment cast steel the bbt 22 utilizes a flat tooth profile to ensure maximum engagement with the bottom bracket cup can be turned with a 38 inch drive torque wrench 38 inch ratchet driver 32mm wrench 1 inch wrench or frw 1 freewheel remover wrench note the bbt 22 replaces the previous model bbt 2