With four magnetic faces, one at 45°. Medium duty with standard clamp. Mounts: 1/4" I/D lug, stem/spigot diameter: 5/16". Base dimensions: 48 x 44 x 51mm. Column height x diameter: 185 x 12mm. Crossbar length x diameter: 150 x 6.3mm. Clamp ring: 8mm. Magnetic pull: 30kg.