- Durable Construction: This 2-piece bicycle key set is crafted from high-quality carbon steel, ensuring exceptional hardness and durability after a rigorous heat treatment process. The galvanized surface adds an extra layer of protection for long-lasting stability. - Versatile 2-in-1 Design: The dual-sided key features one end specifically designed for bottom bracket removal and the other equipped with an inner round tool for crank installation. This versatile design caters to all your crank and bottom bracket needs, making it an essential tool for both professional and home bicycle mechanics. - Wide Compatibility: This tool is compatible with Shimano Hollowtech 2 systems and other common crank and bottom bracket configurations, ensuring it meets a variety of bicycle maintenance requirements. - User-Friendly: With a simple structure, this tool is compact and portable, making it easy to carry and convenient to use in any setting. Whether you’re at home or on the go, you can quickly tackle any bike repair or maintenance task. - Practical Applications: Ideal for home mechanics looking to perform routine maintenance, professional bike shops needing reliable tools for servicing clients, or cyclists preparing for a ride who want to ensure their equipment is in top condition. This tool simplifies the process of removing and installing cranks and bottom brackets.