SP1420MAG25 features a 65mm diameter heavy-duty circular magnetic base that attaches to flat metal surfaces, including forklifts, metal cabinets and bookcases, and other warehouse locations. Connected to the base is a 25mm (1 inch) ball adapter that can be used to mount Arkon Robust Shaft Arms or other 25mm ball compatible components (not included). The adapter can be removed to reveal a 1/4”-20 mounting bolt for cameras and other compatible devices. The heavy-duty magnetic base is perfect for use on surfaces where drilling or clamping is not ideal.