This IceToolz BB Tool is designed for Shimano/ISIS Drive compatible cartridge bottom brackets and chainring lockrings with 8 external notches. It is made from durable Cro-Mo Steel and is intended for use with a 32mm headset wrench. This tool is suitable for Shimano Octalink drive-side bottom bracket cups with external notches, ISIS Drive bottom bracket cups including Truvativ and Bontrager, and front chainring lockrings for Bosch Gen 3 and Gen 4 e-bike systems, as well as front chainring lockrings for Specialized Levo Brose e-bike systems.