The crank that you are trying to remove, does it have a square taper or 8-splines?
If it's a square taper crank, you need the Park crank extractor that has the BLUE handle and the end of it's spindle has a 7mm diameter. If it's a splined crankset, mine has a BLACK handle and an 11mm spindle. The spindle on the blue handled tool will slide harmlessly into the hollow axle of an Octalink bottom bracket.
When you go to install your new crankset, be careful to get the splines lined up before you go torqueing down the bolt that holds it all together. 35 lb/ft is the right torque spec. That's probably more than you would use if you tried tightening it with just an allen wrench.
Last edited by Retro Grouch; 02-21-05 at 01:15 PM.