Robinson International offer a number of magnetic bases. They supply a Fixed Post Type and a Universal Type, as well as a non magnetic Vacuum Base.
Universal Magnetic Bases are available in small, medium and large sizes. The switch type magnet is stronger than any other brand up to 150kg pull.
Universal Magnetic Bases can hold indicators with dovetail, stem or lug base mount. They are supplied with a metal indicator clamp and a lug clamp. These allow the plunger indicators to be mounted in line with the post arm.
Fixed Post Magnetic Bases are available in two options. There are models with permanent magnets or on-off magnets.
Vacuum Bases are suitable for use on any non-magnetic surface such as granite surface plates and painted surfaces. They will also hold on smooth steel surfaces.