A. This is a stem bolt suitable for mountain bikes and road bikes. It is made of a combination of titanium alloy and metal, which is of good quality, strong and durable, and can provide reliable support and stability for the bike. B. The product comes in various specifications, with options of M5x18mm and M5x20mm. Each bolt is equipped with a washer, which can meet the requirements for fixing the bike's front fork. Whether you are facing complex terrains during mountain biking or pursuing speed on road cycling, it can fit perfectly, ensuring the stability of the stem during the ride and making your cycling more worry - free. C. Its use is clear and important. It is mainly used to fix the front fork of the bike and is an important component for ensuring the safe riding of the bike. Through careful design and production, this bolt can play a role in stable connection during the assembly and use of the bike, making your riding experience smoother. D. It is suitable for all kinds of bike enthusiasts and can meet the needs of different riding scenarios.