The Leofoto F-19 Micro Mini Ball Head is a cold shoe adapter ball head. The screw is 1/4" and the cold shoe is interchangeable. The ball head can be used in a variety of ways, either mounted on a camera hot shoe as a tilt-top or on a mini tripod. It is compatible with all kinds of setups including phones, mirrorless cameras, flashes, fill lights, and small DSLR cameras.