Features:High-quality material: Made of high-quality material, wear-resistant and corrosion-resistant, not easy to deform and break, strong and durable.Uses: It is convenient to repair the problem of wheel idling and slipping, and avoid replacing the entire hub or wheel.Easy to use: The screw in the head is movable, and the carbon fits inside the spline.Easy to disassemble: It can be disassembled with a 11mm hexagonal vibrators.Satisfactory service: If you have any questions, please contact us in time. We will provide you with better products and services.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementMaterial: MetallSize: As shownApplicable: 8/9/10/11 speed mountain bike cassette flywheel Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.