Articulating Magic Friction Arm Large Super Clamp Crab Pliers Clip Adapter Most photographers like the 'Crab-clamp' is because that it can be connected to any small size body even it's very thin. The bent clamp can be fixed onto any shaped body such as: water pipes, handrails, doors, shelves, tables, branches, wires hang on the wall (not too tight) etc The screw can also be fixed with Ball-head or Reflective umbrella's joint, which can help the lighting engineers or photographers to easily install their lighting or photo accessories. Can be able to fix onto any shaped body such as: water pipes, handrails, doors, shelves, tables, branches, wires,