Upgrade your bike's drivetrain with this 1Pc Black M19 Crank Arm Screw. Crafted from high-quality aluminum alloy, this fixing bolt ensures a secure connection between your crankset arm and the bike frame. Its robust threads provide a tight fit, minimizing the risk of loosening during intense rides. Designed for both mountain and road bikes, this crankset arm bolt is an essential component for smooth pedaling and efficient power transfer. Keep your drivetrain in top condition with this reliable and long-lasting crank fixing bolt. Dimensions and compatibility should be verified before purchasing to ensure a perfect fit for your bike.