Park Tools Bottom bracket tool - 20 tooth splines: Shimano and ISIS

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The Bottom bracket tool is for installing and removing Shimano and ISIS Drive splined twenty-tooth bottom bracket cups. Can be turned with a 3/8 inch drive torque wrench, 3/8 inch ratchet driver, 32mm wrench, 1 inch wrench, or FRW-1 Freewheel Remover Wrench.Made from investment cast steel, the bottom bracket tool utilizes a flat tooth profile to ensure maximum engagement with the bottom bracket cup

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