Carbon steel construction provides strength, durability, and rust resistance for long lasting service. Key features - Material and durability: Made from carbon steel for reliable performance and longevity. - Compatibility: Suitable for 44–48 mm lock rings and nuts; works with 36 mm openings, 16 mm openings, and grooves commonly found on bottom bracket assemblies. - Design purpose: Specifically designed for bicycles with square-taper bottom brackets. This tool is used to remove locknuts and related hardware. - Function and use: An essential wrench for removing bicycle bottom brackets and associated components. Practical use scenarios - Scenario 1: Servicing a bicycle with a square-taper bottom bracket to replace the crankset. Use this tool to remove the locknut and lockring before extracting the bottom bracket. - Scenario 2: Replacing a worn or damaged bottom bracket. Use this tool to loosen and remove the locknut and related fittings to facilitate bottom bracket replacement. - Scenario 3: Routine bicycle maintenance in a workshop or home garage where square-taper bottom brackets are present. The tool simplifies removing locknuts and nut-based fasteners for component service or replacement. Professional, clear, and trustworthy tooling for reliable bottom bracket maintenance on bicycles with square-taper configurations.