Originally Posted by
Andrew R Stewart
Take care when using this tool. While it is the best lock ring tool i have used (Excepting the size specific campy and Shimano types that encircle the ring) the replaceable hooks/dogs can scratch the BB shell. They have a cut away to help reduce this possibility but careful positioning is still needed. Andy.
I learned that one the hard way. Still, it's the best I've ever used. It will also tighten/remove track cogs.