Shimano TL-FC25 Bottom Bracket Tool Adapter for SM-BBR60, BB-MT800
13 Sep, 2016
Does the job... just
As far as I'm aware, this is the only way to get new style 105 or Ultegra BB's on or off. The adaptor just slots into a BB tool and then over the BB itself.
Sadly the adaptor is pretty weak and it's very easy to strip the threads on it. Just waiting for someone to make a proper tool to deal with these BB's.