Eskimowe

Hi, I hope you don't mind me posting here. I am trying to find a particular item to start a project as the specific ones for the job cost £150. The best way to do this is to provide you with pictures. Ok, so we have here a quick release device to clamp onto a metal rod. Does anyone know where I can buy these? It doesn't have to look exactly like the one above. The red part is the handle which twists and closes the clamp together. The diameter of the rod to which this clams would be roughly 2-3cm, exact measurements not important at this stage. example 2 Many thanks in advance.