DO NOT try to use a traditional pin wrench to remove those ISIS bottom bracket cups. They are aluminum and installed much tighter than a traditional cup and cone BB lockring would be. You'll destroy them quickly. Buy the right tool for the job. Unfortunately, for some unknown reason Park Tool, whose tools I can usually trust, makes a god-awful 8-pin tool for this job. Don't waste your money on it. Get this one and be done with it: Truvativ Isis Drive BB Tool > Accessories > Tools & Maintenance > Bottom Bracket Tools | Jenson USA