The black Convi Clamp with Adjustable Handle and Hex Stud from Kupo has a load capacity of 44 lb and a ratcheted handle that allows you to reposition it for tightening and loosening in tight places. Made from lightweight aluminum alloy with stainless steel bolts, the clamp has jaws that open from 0.2 to 2" to grasp poles, pipe or other objects. A saddle (wedge) is included to create a flat surface for items like a desk, shelf or wood plank. The Convi Clamp has a hexagonal receiver that accepts many Convi accessories such as the included anti-twist brass hex stud that allows mounting of lights, cameras or accessories.