Park Tool Bottom Bracket Remover BBT-18C - Shimano / ISIS

Bottom Bracket Tool
The BBT-18 is a heavy-duty, investment cast tool designed for installing and removing the following 8-notch bottom bracket cups:
Shimano Octalink - right cup with external notches
ISIS Drive
The BBT-18 features 8 notches with an outside diameter of approximately 43.4mm. The inside-to-inside width is about 38mm, and each notch is roughly 3.9mm wide. The hole in the center of the casting measures 22.5mm and will not accommodate 30mm spindles.

BBT-18 Features
Installs and removes the following components with eight-notch tool fittings:
Shimano® Octalink® drive-side bottom bracket cups with external notches
ISIS Drive bottom bracket cups including Truvativ® and Bontrager®
Front chainring lockring for Bosch® Gen 3, Gen 4, and Gen 5 e-bike systems
Front chainring lockring for Specialized® Levo Brose e-bike systems
Tool specifications:

8 notches with a nominal outside diameter of 43.4 mm
The hole in the center of the casting is 22.5 mm, and will not fit over 30 mm spindles
Features 36 mm wrench flats