1. Replacement for your defective or breakdown part. 2. The base is crafted from metal materials, ensuring durability and long service life. 3. Features a precision alignment design, ensuring integration between the lens and camera body for the shooting experience. 4. The simple and user-friendly design allows for quick and easy installation and removal of lenses and bases, saving time and effort. 5. Sturdy construction delivers stable support, ensuring lens stability and reliability in various shooting environments.