plates attach to the tripod mount on your camera and allow you to quickly and easily attach and detach your camera from a compatible tripod head. A plate can be kept attached to the camera's base. It includes 1/4"-20 threaded camera screw and camera pin. Fit well with 668 690 600 D680 D580, EX-638CX-888CX-460CX-460CX-470CX-570CX-690 CX-444 DF-50 FHD-52Q, This allows you to attach or remove the camera from the tripod quickly and easily having to waste time fumbling with the threaded mount.