1. Efficient and Reliable This bicycle crank removal tool is made from durable materials, ensuring longterm functionality and reliability. It is a dependable tool for both removing and installing bicycle cranks. 2. Specifically Designed for M9100 This wrench is specially designed to be compatible with the M9100 crankset installation. It provides a fit, ensuring precise and efficient assembly of the crankset on your bike. 3. Convenient and Versatile With this crank removal tool, you can easily use a 1/2inch ratchet wrench or a 13mm openend wrench to quickly and effortlessly remove or install the crankset. Its design ensures compatibility with various wrench types. 4. Effortless Crank Removal Using this wrench, you can effortlessly remove the crankset from your bike without any hassle. Its ergonomic design offers a comfortable grip and allows for efficient force application during the removal process.