SUNWAYFOTO brand Focusing Handle DRH-77.Allows Precision focusing and zooming.Great for rotating filters like CPL. 1. Precision machined from solid aircraft-grade aluminum. 2. Anodized finish, solid and durable. 3. Patented Ring-Handle adjusting lock avoid scratches.4. light and portable. Please measure the diameter of your lens where you intend to mount it. Inner diameter: 75-83mm. Handle length: 46mm. Weight: 53g. Material: 6061T651.All metal construction.