Originally Posted by 13ollocks

This is why I'm not wild about the CCP-22 and similar tools - you're sort of limited to whatever leverage you can develop with the attached handle. If you're not doing this with the bike sitting on it's own wheels on the ground, then do so. Stop the crank from rotating by putting something under the crank arm and use body weight to push on the handle. Any torque you exert will be small potatoes compared to what the frame has to endure while cycling. Make sure that the tool threads are greased and the tool screwed all the way into the crank (use a wrench to ensure that it's all the way in) - the more threads are engaged, the less likely that you'll strip them