Compatible model Our bicycle bottom bracket lock ring tool is compatible with all eight-notch bottom bracket shells from Shimano and ISIS SRAM Truvativ Drive. Note: Please check compatibility before purchase to ensure the tool size fits your bottom bracket. Package contents Includes 1 piece bottom bracket tool Specifications: outer diameter 42 mm, inner diameter 32 mm, bore 22.5 mm, 8 teeth Material Made of durable carbon steel for long-term use Ergonomic design Ergonomic handle provides a comfortable, non-slip grip during use Benefits and use - Enables reliable removal and installation of eight-notch bottom brackets on compatible Shimano, ISIS, and SRAM Truvativ Drive systems - Robust construction supports repeated use in both workshop and field repairs - Precise sizing and fit help reduce the risk of damage to the bottom bracket or shell during service Use scenarios - Replacing or servicing bottom brackets on bikes with Shimano, ISIS, or SRAM Truvativ eight-notch shells - Bike shop maintenance or DIY home workshop projects that involve bottom bracket installation or removal - On-site repairs during rides when a compatible bottom bracket tool is required