Upgrade your bicycle's crankset with these precision-engineered M20 crank arm bolts from YANRUHFL. This 2-piece set of aluminum alloy screws is designed specifically for securing bicycle cranks and crank covers with reliable strength. The lightweight aluminum construction adds minimal weight to your bike while maintaining durability. These crank screws are an essential component for bicycle maintenance and assembly, ensuring your crankset stays securely fastened during rides. Whether you're performing routine maintenance or building a new bike, these crank bolts provide the reliable connection you need for your bicycle's drivetrain system.