David Bomzerwrote a review of Abbey Bike Tools Bottom Bracket Socket - Dual Sided Dura Ace & Ultegra on September 2, 2016
Familiarity: I've used it once or twice and have initial impressions
If you are installing a bb that uses this tool it is a must have. Easy to use and works great. Turned an hour of struggling with a Shimano adapter (not needed here) and other tools into a 30 second easy activity. Abbey tools are a bit costly but I'm sold.