INDURO BHD dual-action ballheads offer increased load capacities, large ergonomic locking knobs, adjustable drag and tension control, independent panning control and much more. Made of precision-machined Magnesium alloy and incorporating an Arca-Swiss style quick release system for maximum compatibility and flexibility, these heads are designed to handle virtually any shooting situation and equipment ? from compact to full-sized professional gear. Include a matching Arca-Swiss compatible Quick Release Plate. Fits Size 3 Tripods.