I received my purchase promptly yesterday and after watching a YouTube film I tried the rods out. My drain had been blocked for about a week and within 5 mins I had unblocked it and flushed it down with the hose. I am extremely pleased with my purchase and being a 73 year old woman felt I had really achieved something. I am glad the rods are flexible as otherwise they might not have gone down the drain as there is a curve. Would highly recommend this product!