- Tool-b: Designed for bottom brackets with an outer diameter of 46 mm and 24 notches. This tool ensures a precise fit and reliable performance, making it essential for effective installation and removal. - Tool-a: Compatible with bottom brackets featuring an outer diameter of 44 mm and 16 teeth. This model is a standard specification for various bottom bracket types, including BB51, BB52, BB70, BB71, BBR60, MT800, and RS500. It simplifies servicing and maintenance of your bike. - Manufacturing Process: Each tool undergoes heat treatment, polishing, and anodizing to enhance durability and resistance to wear, ensuring long-lasting performance. - Compatibility: Both tools cater to specific bottom bracket sizes, allowing for efficient maintenance and repair of your bike's drivetrain. Use Cases: 1. Ideal for professional bike mechanics performing routine maintenance on various bike models. 2. Perfect for DIY enthusiasts looking to upgrade or replace their bottom bracket with ease and precision. 3. Essential for cycling clubs and teams that require reliable tools to keep their bikes in top condition during events and races.