I purchased this on Amazon. It can be attached to a motorcycle mirror. When attaching it to a motorcycle mirror, four types of spacers (interference agents) are included to adjust for size discrepancies, allowing it to accommodate a wider range of sizes. I am selling it unused because the attachment I wanted was not included. If you have any questions, please feel free to comment. The following is the product description created by AI: This is a high-strength alloy camera mount, perfect for attaching a camera to a motorcycle or bicycle. The double ball head design allows for flexible angle adjustment, greatly increasing the freedom of shooting. It supports a standard 1/4 inch screw, and can be used with most cameras and action cameras. [Product Specifications] Weight: Approximately 220g Total Length: Approximately 16.3cm Connecting Rod Length: Approximately 9.5cm It can be securely fixed and offers excellent stability! Recommended for touring photography on a motorcycle. Instant purchase OK, delivered via anonymous shipping!