Features: Made of high quality aluminum alloy, CNC precision machining, surface anode anti-oxidation treatment. The rotatable dial is laser-engraved with precise angle index (180), conveniently capture overlapping panoramic images. 3pcs built-in bubble level and precision scale make your photography more precise. Mount it directly to any Arca Swiss clamp using dovetail. With 1/4 to 3/8 convertible screw, 3/8 central threaded hole can be directly installed on monopod, all conventional tripod heads and other mounting units with 1/4 or 3/8 stud. Adopts for Arca Swiss standard, compatible for Arca Swiss standard all quick release plates, such as for RSS, for Arca-Swiss, for Kirk, for Wimberley, for Markins, etc.