The easiest and quickest solution for locking camera plates securely in place with a new lever-actuated system. One jaw is adjustable to accommodate various Arca plate sizes, then the lever can be opened and closed quickly. A locking pin ensures that the QR plate cannot slip out of the base when opened. This base is additionally equipped with a bubble level to facilitate horizontal alignment of the camera. Arca-compatible and adjustable to various Arca plates.