1、Compatibility: The thumb up grip is designed for A7M4, A7R4, A7R5, A7M5 camera, it attaches to your camera via the hot shoe to dampen vibrations and provide stable, protected contact with the camera. 2、Aluminum Alloy Material: One piece CNC machined anodized aluminum alloy delivers high accuracy. Conveniently assembled and disassembled. Light weight, high strength, and good durability. 3、Ergonomic Design: This grip provides a more ergonomic structure to the camera, allowing for greater one handed operation as well as more balance and less grip pressure required when shooting. 4、Convenience: Just slide this grip into the hot shoe, it will make you comfortable and easy to hold the camera, and provide a secure hold during shooting. Sliding into the hot shoe, to protect the hot shoe from dust, moisture and impact. 5、Enhanced Comfort: You can securely grip the camera and hold it in any position with the thumb up. Provides a better balance and grip for the camera. A secure hold during shooting, adds comfort while holding camera.