Perfect Compatibility: Specifically for 5DIII, 5D3, 5DSR, ensuring a precise fit with original components to enhances user and camera functionality operate Efficiency: Features a crossing navigation button design for quick access to camera setting and option, allowing faster parameter adjustments and boosting efficiency Durability & Wear Resistant: Made from rubber, offering excellent durability and friction resistance for long term use without wear, while maintaining smooth tactiles feedbacks Protections: Equipped with proof rings to effectively block and debris from entering the camera interior, extending its use and maintaining optimal Easy Installation: User friendly design allows simple installation without professional tool, quickly restoring both functionality and aesthetics of your camera