From Manufacturer
The MOVE Quick Release Plate from Manfrotto is a compact circular quick release plate for the MOVE Quick Release Catcher System. This machined aluminum plate features a 1/4"-20 threaded mounting screw and a storage space for a 3/8"-16 bushing adapter, so one will always be on hand if needed. It also incorporates an anti-rotation set screw to help secure any mounted head or device from coming unscrewed from the plate.