Cartridge BB? Be careful with the tool/BB interface - if it's a hollow spindle, you can put a QR skewer through and hold the tool to the BB. For removal, it's often easiest to put the tool in a vise and turn the frame. As long as you're sure you're turning in the right direction, it's pretty hard to damage the frame. Same technique works well for removing the fixed cup from a cup and spindle BB.