Park Tool BBT-7 Lockring Wrench: The BBT-7 Lockring Wrench is used for installing and removing the lockring used on Dura AceŽ 7700 and XTRŽ 950 Bottom Brackets. It is laser cut and engages five of the lockring's six notches for a precise, secure fit. The handle is vinyl dipped for comfort. While made specifically to fit Dura AceŽ and XTRŽ Lockrings, it also fits several other lockrings as well.
