With four magnetic faces, one at 45°. Heavy duty with universal clamp. Mounts: 1/4" I/D lug, stem/spigot diameter: 1/8", 5/16" and 3/8". Base dimensions: 48 x 44 x 51mm. Column height x diameter: 175 x 12mm. Crossbar length x diameter: 165 x 10.0mm. Clamp ring: 8mm. Magnetic pull: 30kg.