Triad-Orbit IO-C2 Mini ClampiO C2 iO Equipped Mini Clamp is a different take on our iO C clamp. Unlike the iO C, the iO C2 has two possible points of connections; a larger opening for securing to stands, booms, iO connectors, or a smaller opening, which allows for extremely stable connections to smaller rod or bar stock. It is shown clamping to the stem of an M3. The inner jaws have rubber coating to not mar surfaces. While the iO C is great for clamping devices to round shafts