1. This adjustment screw for bicycle cable housings is designed specifically for mountain bikes and road bikes. It is compatible with derailleurs and rear derailleurs, and is a good option for improving the shifting and braking performance of bicycles. 2. The screw is made of aluminum alloy, offering decent quality and durability. It can withstand the rigors of daily riding and provide long - term stable support for your rides. 3. It comes in various specifications, including M5 and M6 cable housing screws. Different specifications can meet diverse needs. No matter what size of screw your bicycle requires for adjustment, you can easily find a suitable one. 4. It has a wide range of important uses. It is mainly used for the adjustment of bicycle shifting and braking. The precise adjustment function can make your bicycle shift more smoothly and brake more sensitively, greatly enhancing the safety and comfort of riding. Whether you are a professional rider pursuing extreme speed on the track or an ordinary enthusiast going for a casual ride, it can play an important role in enhancing the riding experience.