A. The disc brake mount fixing screws for this mountain bike are made of a metal material, specifically titanium alloy, and feature a lightweight and hollowed-out design. They are of the M6x18 specification and belong to the category of hollow disc brake mount screws. Each bag contains 4 screws. B. These screws are suitable for mountain bikes and can effectively fix the disc brake mount, providing stable braking support during cycling. In terms of quality, the titanium alloy material gives the screws good durability and strength, enabling them to withstand the challenges posed by various complex road conditions during mountain cycling, ensuring a secure installation of the disc brake mount and making cycling safer and more reliable. C. They can be widely used in the assembly, maintenance, and upgrade scenarios of mountain bikes, and are a practical choice for mountain bike enthusiasts and maintenance personnel. With good adaptability and decent quality, they can meet different user needs for fixing the disc brake mount of mountain bikes. D. In addition, this product is sold in multiple regions such as Europe, South America, Southeast Asia, North America, and Northeast Asia, and has gained recognition from many users. Moreover, it has an authorized self-owned brand, and its quality is trustworthy.