The Z-Finder Mounting Frame for Tall DSLR Bodies must be used in conjunction with the Gorilla plate. The Z-Finder frame attaches to the Gorilla plate with two thumb screws the Gorilla plate is attached to the bottom of your camera. The frame has a rubber coating on the end which stays against the LCD screen with pressure (on larger, pro-bodied cameras only. Smaller cameras may have a slight gap between the frame and LCD screen). The connection between the Z-Finder and frame is a snap fit. The Z-Finder snaps into the frame and can quickly snap off for going between video and photos. To release the frame from your camera, you must un-do the thumb screws and slide the frame off. This frame is used on the taller body cameras such as the Canon 1D Mark IV.