This Mamiya Quick Shoe Model 3 is specific to the Mamiya 645, RZ67 and RB67 cameras and consists of a two piece set in which one piece is attached to the camera (the Plate) and the other to the tripod (the Shoe). When this is done, the camera can be instantly mounted to, or removed from a tripod by merely pressing a "release switch" and sliding the camera on and off.
Note! Extra plates for this unit available; Quick Shoe 3 for the Mamiya 6/7 is #215-058