Gitzo G1378M Magnesium 3 Series PTFE Center Ball Head with Quick Release Plate Made of high quality low weight magnesium. Maximum capacity 17.6 lbs, handle up to medium format cameras. Spirit level to ensure the head is perfectly level. Security locking system for the plate so equipment cannot accidentally fall off the head, even if it has not been locked down. To remove the equipment and plate, simply press the lock release button and slide the plate out. Non-keyed square plate. Keeping any side of the mounting plate parallel to the back or front of the camera ensures perfect alignment without having to worry how the plate fits on the adapter.