Description: - 【Quality Material】: These disc brake rotor screws are made from carbon steel, featuring cold forging and treatment processes to achieve a hardness level of 10.9, ensuring durability and strength for secure installation - 【Precision Engineering】: Designed with an M5x9 MM thread size, these bicycle disc brake rotor screws have a proper thread pitch processed by automated rolling machines, providing uniformity and reliability in every piece - 【Enhanced Features】: Each bicycle bike disc brake cycle rotor screw is treated with anti slip design on the threads to increase friction and prevent loosening during rides, ensuring a cycling experience - 【 Design】: Mountain bike disc brake rotor bolts feature an umbrella head with a T25 drive for easy installation and removal, offering compatibility with most mountain bike disc brake systems - 【Complete Set for Convenience】: This package includes 12 t25 bolts per pack, which is typically sufficient for a bicycle's disc brake rotor installation needs, making it convenient for complete replacements or upgrades Specification: - Material: Carbon Steel Size Chart: Specifications: M5x9 mm/0.20 inchx0.35 inch Thread diameter: 0.49 cm/0.19 inch, height: 0.9 cm/0.35 inch Screw nut height: 0.3 cm/0.12 inch Package Includes: 12 Mountain Bike Brake Disc Rotor Bolts Note: Please allow slightly errors due to manual measurement and different monitors.