Originally Posted by
onespeedbiker
It's interesting, but with the probability of scratching the paint and/or denting the BB shell, I think I stick with a chain whip or x201's Ratchetfix
You'll break the chain or strip the threads on the hub before you dent the BB shell, which also goes to show how much force you can put on a cog with this method.
As mentioned, a rag around the BB shell will prevent it from getting scratched. Or if you just rode s----- old bikes like me you wouldn't have to worry about such things