This Arca Swiss 55mm (2.1") quick release plate features one 1/4"-20 and one 3/8" camera screw and is customised to fit Hasselblad cameras. Also compatible with the many other Arca-type quick release systems, e.g. Acratech, Foba, Graff, Wimberley, etc.
Please note that you cannot use both screws at the same time.