With two magnetic faces and large vee. With universal clamp. Mounts: 1/4" I/D lug, stem/spigot diameter: 1/4" and 1/8". Column height x dia.:175 x 12mm. Crossbar length x dia.: 165 x 10mm. Clamp ring: 6.35mm. Magnetic pull: 50kg. Base dimensions: 60 x 50 x 55mm.