JJC Male 1/4" - Female 20 threaded socket to female adapter JJC MSA-9 has a Male 1/4"to Female 20 threaded stud on the bottom and "cold" flash shoe on the top, and is designed for use with an auxiliary flash or accessory. The locking ring affixes this shoe to the device you screw it in to. It is ideally suited for use with camera brackets, tripods, or light stand with a 1/4"-20 threaded socket. Specifications: 1/4"-20 threaded stud to female adapter