The PGYTECH Magnetic Mount Base can be adhered to a variety of metal surfaces like vehicles, railings, and refrigerators. All you need is a flat surface. It accepts a variety of accessories. The base offers virtually unlimited rotation, tilting, and panning.
This mounting base is built well and the magnetic strength is impressive. I use it for a phone mount with an extended 7” arm. It has not budged, even over rough roads, etc. I was unsure if it would really work for my purposes due to the leverage the mount arm places on it, but it has been perfect.