Quick release 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. Extra quick release plates allow you to conveniently swap out more than one camera with the same tripod. The Velbon QB-4W quick release shoe is designed to be used with the Velbon PH-249Q Pan Head and CX-444 / CX-460 Mini / CX-Compact / CX-888 tripods.