Originally Posted by
operator
-1
The upper position on the chain tool was designed to resolve stiff links. The other option is to bend the chain with your hands back and forth. Don't do this on 10 speed chains.
http://en.wikipedia.org/wiki/Chain_tool
I didn't know this. My chain tool is the one that comes with the Crank Bros M19 multi-tool and I don't think it has a position for loosening still links. The hex-key trick works just fine though.