material: premium flex plus carbon steel
• 1/2˝ square drive makes it easy to use with ratchets, fixed handles and torque wrenches
• Compatible with:
• Shimano Octalink® bottom brackets with outside notches, Bontrager ® and Truvativ ® ISIS Drive ® type bottom brackets
• Bosch® Generation 3 and Generation 4 E-bike system front chainring lockring