L x w : 3in x 3.5in; Made of all-metal materials and durable * The camera adapter (bottom) is threaded into the unit with a 3/8 to 1/4 20 bushing adapter making it easy to use it with larger 3/8 mounting hardware. * Provides extra mounting points for a light, microphone, monitor or audio recorder * The Three-hot shoe mount has a built-in umbrella hole in center, which auto-locks with reed. * The Three shoes are all cold (meaning they can"t be used to power any devices)