Feature: 1. Magnetic Quick Mount: The ring adapter easily switch your 77mm filters from screw mount to magnetic mount for quick and convenient filter changes, saving your time and effort. 2. Sturdy Construction: Made from aluminum alloy with CNC technology, the camera filter ring adapter provides enhanced oxidation and drop resistance, ensuring no deformation. 3. Enhanced Performance: The magnetic adapter ring achieves precise alignment between filter adapter and camera lens for light leakage proof results and superior image quality. 4. Simple Installation: Bottom ring securely screws into place with standard threading, while top ring allows for normal screwing of filters, ensuring easy and secure setup without detachment. 5. Lightweight and Compact: The ring adapter converter is extremely lightweight, adding minimal weight to your camera setup for effortless use and portability, not affecting your camera's performance. Specification: Item Type: Magnetic Ring Adapter Material: Aluminum Alloy Size: Approx. 77mm / 3in. Package List: 1 x Upper Ring1 x Lower Ring (Pre Installed)