Park Tool BBT-19 Bottom Bracket Tool
The new BBT-19 is a heavy duty, shop quality tool for installing and removing 16-notch external bearing bottom bracket cups. Made from investment cast steel, the BBT-19 can be used with either a 3/8" drive torque wrench, 3/8" ratchet driver, FRW-1 Freewheel Remover Wrench, or 1" wrench.
The tool works exactly like it's supposed to. When you go into the bike shop and look at the tools they are using it's always Park Tool tools. That was good enough for me.