This bottom bracket tool set offers broad compatibility, robust construction, and practical design for MTB, road, and e-bike maintenance. Key benefits - Wide compatibility: The 8-tooth lockring tool fits most 8-groove bottom bracket housings on the market. The crank puller handles both ISIS and Square taper crank systems with its universal size. The removable dual-functional cover cap adapts to different oversized axles. - Durable materials: Made from carbon steel with hardness treatment for high strength and deformation resistance. A rust-protection coating ensures stable performance in moisture. Compared with conventional chrome-plated tools, it offers better wear resistance and longer service life. - Easy to use: Three-piece wrench system — thread base, adapter, and adjustable protective cap — simplifies operation. The extended lever increases torque by 30%, making crank arm removal easier, even for users with less hand strength. Non-slip handles with an ergonomic angle enable safe work in gloves. The multifunctional cap also acts as thread protection and adapter, avoiding extra parts changes. - Complete, multifunctional core: The set includes three core components — a crank puller (ISIS compatible), an 8-tooth lockring tool, and a multifunctional cap. The precise 8 teeth prevent slipping when loosening the lockring, delivering reliable performance for bearing replacement, crank arm adjustment, and routine maintenance. Use scenarios - Home workshop maintenance: remove a stuck crank arm and replace bearings on a standard 8-groove lockring bottom bracket. - Road or MTB service: quickly swap bearings or adjust the crank arm without hunting for compatible tools. - E-bike upkeep: handle common bottom bracket service tasks with a compact, all-in-one solution. This tool set provides a professional, reliable solution for bottom bracket systems, combining compatibility, durability, and ease of use in a single complete package.