Specialized Tools

Shimano Lockring Removal Tool (TL-LR15)

And a Craftsman 15/16 6 point socket has been installed. There is quite a bit of overkill in the rachet I think. I believe that the driver size of the lockring removal tool is intended to support a specialized wrench that is used primarily on bicycles. I prefer to use a ratchet since that arrangement is so much easier for me to control.