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The Park Tool BBT-22C is a shop quality tool for installing and removing Shimano and ISIS drive splined 20-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. The tool can be turned with a 3/8 drive torque wrench, 3/8 ratchet driver, 2mm wrench, 1 wrench, or FRW-1 Freewheel Remover Wrench.