Super Viser Clamp is built with an aluminum die casting body making it sturdy and lightweight. The moveable jaws are designed for mounting on tubes or planks up to 101mm (228mm is available for longer version KCP-601). With the innovative grooved design on the threaded shaft, both jaws can be kept in the same direction all the way. In addition to the 16mm pin located at the end of the shaft, the unique design of 16mm socket is also built on the clamp that allows all Convi Clamp accessories to fit onto the Super Viser.