Jennifer Cwrote a review of Park Tool BBT-79 Bottom Bracket Tool on January 15, 2019
Familiarity: I've used it once or twice and have initial impressions
First off, why are there so many specific and proprietary bike parts? Why does one BB need to have a unique number of notches to differentiate it from another one?
Aside from that, I only used this tool once to swap a BB from one bike to another. After one use, the part's metal had bent and was completely stuck on the 3/8