Andoer Compact Quick Release Assembly Platform Clamp + RP-20 Quick Release Plate Compatible with Giottos MH652 MG652 + MH642 Quick release plate with slot to allow your camera plate to be adjusted over 19mm (0.75in) to ensure the best balance for the camera. The plate is released from the base via the double action safety lever. This prevents unintentional release of the plate. The camera plates have a spring loaded centering pin for easy use with video and many digital cameras. The base plate features 3 Axis Bubble Levels to easily and accurately level the camera in any position. The base also has centering pins for easy alignment with heads with a centering pin.