It’s constructed by lightweight and durable aluminum providing a secure mounting option for virtually any type of shoe-mounted device - radio slaves, speedlights, light meters, etc. It also comes with spring-tensioned adjustment knob accepts to ensure strength and a secure fit to almostany flat foot of flash. Standard 1/4"-20 mounting thread is tapped on the bottom for quickly and easily attach to flash brackets, tripods, light stands, Convi clamps, etc.