BioLogic AnchorPoint Bar Mount Works with BioLogic Hard Case, all sizes of the BioLogic WeatherCase, Bike Mount Dry Bag and other cases with an AnchorPoint clamp backplate Flat and 10 angled mount bases allow flexible placement on bicycle stems and handlebars Spring-loaded positive stop screw locks clamp claws in place Mount clamp can attach to standard camera tripod mounts for use on tripods Fits stems and handlebars 25.4  31.8 mm in diameter