Lever type two magnetic faces and large vee. Universal clamp. | Mounts: 1/4″ I/D lug, stem/spigot diameter: 4mm, 8mm, 3/8″ without bush. | Base dimensions: 60 x 50 x 55mm. | Column height x dia.: 175 x 12mm. | Crossbar length x dia.: 150 x 10.0mm. | Clamp ring: 6.35mm. | Magnetic pull: 50kg.