Features: *The adjustment screw installed in the middle of the line tube is good news for riders who have difficulty installing the tail adjustment screw at the shifter and brake handle. *After pulling out the pull wire core, cut it at any position in the middle of the line tube (of course, for the convenience of adjustment, it is recommended to cut it near the handlebars), install the line tube at both ends (need to be purchased separately), and insert this adjustment screw. *Mountain bike, road bike shift line tube, can be installed! *Made of high-quality materials, anti-corrosion, wear-resistant, and non-deformation *Enhance appearance: Add fashion personality and make your car look cooler and more distinctive. *Easy to install: Easy to install, firm and not easy to fall off. Simplified installation with no modification, cutting or drilling required. *Fashionable and long service life. Please confirm the suitability of the model before purchasing. Specification: Product Name: Bicycle Fine-tuning Screw Material: Aluminum Alloy Size: (As Pictures Show) Weight: About 3.5g Color: Black (as shown) Package Content: 2* Bicycle Fine-tuning Screw Notes: 1. Due to various factors such as monitor brightness and light brightness, the actual color of the item may be slightly different from the image displayed on the website. 2. Manual measurement data may have slight deviations. Compatibility - Bicycle speed change middle section aluminum alloy fine-tuning screw Good Performance Materials - These bike accessories are made of premium material, ensuring their durability and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability to different cycling needs and provide optimal performance and reliable functionality enhance the riding experience and ensure safety. Easy Installation - These accessories can be easily installed on your bike to get your bike running again. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.