Features: Ensure the safety of your belongings with this specially designed bracket for bike forks, providing reliable security during rides. Made with Aluminum Alloy+Plastic materials, this bracket offer durability and waterproof features without signal interference. The installation is simple and will not damage the bicycles. The installation is firm and concealed, and the signal is not shieldeds. This bike mount is Suitable for mountain bikes with the inner diameter of the bottom hole of the front fork ranging from 18-30mm/0.71-1.18inch. Suitable for cycling enthusiasts, city commuters and users who need to protect bike tube. Specifications: Material: Aluminum Alloy+Plastic Size: As Shown Applicable Front Fork Inner Hole Diameter: 18-30mm/0.71-1.18inch Package Includes: 1set Anti-Theft Bicycles Mounts note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.