Cờ lê Bottom Bracket T47 (T47 Bottom Bracket Wrench)

designed for T47 bottom bracket, maybe also useable for BSA 30

about 48/50.5mm diameter with 12 nuts

PLA works better than ABS.

did used it for disasemble a bottom bracket after some ride. 

Just for the one which dosen't quite tight installed. you should better use it for installing. 

But not for losing it from a bike after a long ride. It is not strong enough for long term usage!