The clamp holds flash heads secure, alleviating possible stress on the flash hot shoe as seen with traditional cold shoe mounting. The hot shoe area is open and can be used with shoe-based flash triggering systems. The Phottix Griffin is fast to set-up and easy to store – perfect for shooting on locations with an umbrella. The Phottix Griffin features a 3/8” lug for mounting in an umbrella adapter and a ¼” x20 female thread. Items Include: 1-Phottix Griffin Universal Flash Mount (#87303)