The SHAPE Super mafer clamp is made of sturdy aluminum to offer maximum clamping pressure. The protective pads in the jaws offer very strong gripping action. To close the jaws, the SHAPE super clamp has a ratchet knob for additional flexibility. It is bundled with a brass plated steel 5/8 - 27mm spigot in order to attach microphone holders around a film set. Our super clamp also includes a removable impact wedge insert, used for flatter surfaces. Three ¼-20 threaded holes are also included to attach additional accessories.