This Tool allows you to tighten and loosen TorqTite BB cups for BB86/92, BB386 and PF30 BB shells as well as outboardBSA/ITA cups for 24mm spindles and all T47 cups. The BB86/92 sidealso works for centerlock disc brake lock-rings. This item is a single wrench, though we recommend two for proper TorqTite BB installation, or a single wrench can be used in conjunction with BBT-001, BBT-015, BBT-029 or BBT-025 on the opposite side.