The Avenger Super Clamp C1575B is an ideal clamp for cinema, Broadcast or Lighting & Entertainment application. Clamping system achieved via a metal knob ensuring extra solidity. Works on diameters from 13mm to 55mm. This super clamp has strong jaws that open up to 2.16″, then lock securely with the ergonomic twist handle. It has 1/4″-20 female threads, a dual locking 5/8″ hexagonal female receiver for studs and arms and 2 included wedges for clamping onto flat surfaces.